Hydrologic Outlook
Ends in 10 h 17 min
When
Until Sun 6:15 AM
Where
Hawaii in Hawaii, HI; Oahu in Honolulu, HI; Kauai, HI; Maui, HI
Issued for this county · National Weather Service Honolulu HI
Full alert textHide details
ESFHFO
A significant pattern change is expected Monday night through at least Thursday as deep tropical moisture is brought north. A combination of surface lows and troughs will bring exceptionally moist air over the eastern end of the state beginning Monday night and extending to all islands Tuesday. Heavy rain and thunderstorms are possible throughout this period. Models have not converged on details yet, so exact locations, timing, and rainfall amounts are not certain. Please be prepared for periods of heavy rain this coming week.
Keep up to date with the latest forecast information through the Internet (weather.gov/hawaii), local media, social media, or NOAA Weather Radio broadcasts.
An updated outlook will be issued Sunday by 6 AM HST or sooner if necessary.
Areas: Hawaii in Hawaii, HI; Oahu in Honolulu, HI; Kauai, HI; Maui, HI
See it on weather.gov (opens in a new tab)

Observed 7:30 PM HST at PHSF

Discovery Harbour, HI weather

Overcast and 59°15°.

Forecasts agree

Now 59°15°

Cloudy

Wind: Calm; Up to 9 mph14 km/h through 7 AM
Dew point: 57°14°; A little sticky · up to 70°21° by 8 PM (oppressive)
Humidity: 94%; Air 59°15°, dew point 57°14° · fog or dew likely
UV tomorrow: 8Very high; High 11 AM–3 PM · peak 8
Air quality: 22Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.31 inHg1026 hPa; Rising · +0.05 inHg+1.5 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Dry until noon tomorrow
Low 73°23° tonight at 3 AM
Rain tomorrow noon–6 PM (20%, 0.12 in3 mm)
High 81°27° tomorrow at noon
Rain Monday from noon (60%, 0.54 in14 mm)

TonightNear 74°23° · rain chance 20% · Mostly cloudy
Tomorrow morningUp to 80°27° by 11 AM · Mostly cloudy
Tomorrow afternoonNear 80°27° · Rain all afternoon (20%)
Tomorrow nightDown to 73°23° by 3 AM · rain chance 10% · Mostly cloudy
Monday morningUp to 79°26° by 11 AM · Partly cloudy
Monday afternoonNear 79°26° · Rain all afternoon (30%)

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 7p	Cloudy	75°24° (likely 75°24° to 76°24°)	75°24°	20%	8 mph13 km/h from N, gusts 7 mph11 km/h	83%	92%	0
Sat 8p	Cloudy	75°24° (likely 75°24° to 76°24°)	75°24°	20%	9 mph14 km/h from NE, gusts 6 mph10 km/h	86%	91%	0
Sat 9p	Showers	75°24° (likely 74°23° to 75°24°)	75°24°	20%	9 mph14 km/h from NE, gusts 6 mph9 km/h	85%	86%	0
Sat 10p	Showers	75°24° (likely 74°23° to 76°24°)	75°24°	20%	9 mph14 km/h from NE, gusts 5 mph7 km/h	84%	83%	0
Sat 11p	Showers	75°24° (likely 73°23° to 75°24°)	75°24°	20%	7 mph11 km/h from WSW, gusts 4 mph7 km/h	83%	81%	0
Sun 12a	Mostly cloudy	74°23° (likely 73°23° to 75°24°)	74°23°	5%	7 mph11 km/h from WSW, gusts 4 mph6 km/h	83%	78%	0
Sun 1a	Cloudy	74°23° (likely 73°23° to 75°24°)	74°23°	5%	7 mph11 km/h from WSW, gusts 4 mph7 km/h	84%	80%	0
Sun 2a	Cloudy	74°23° (likely 73°23° to 74°23°)	74°23°	5%	6 mph10 km/h from W, gusts 4 mph6 km/h	85%	86%	0
Sun 3a	Cloudy	73°23° (likely 73°23° to 74°23°)	73°23°	5%	6 mph10 km/h from W, gusts 4 mph6 km/h	84%	90%	0
Sun 4a	Cloudy	73°23° (likely 73°23° to 73°23°)	73°23°	5%	6 mph10 km/h from W, gusts 5 mph8 km/h	83%	86%	0
Sun 5a	Mostly cloudy	73°23° (likely 73°23° to 74°23°)	73°23°	5%	3 mph5 km/h from ENE, gusts 5 mph9 km/h	81%	80%	0
Sun 6a	Cloudy	73°23° (likely 73°23° to 74°23°)	73°23°	0%	3 mph5 km/h from ENE, gusts 5 mph9 km/h	81%	87%	0
Sun 7a	Mostly cloudy	73°23° (likely 73°23° to 76°24°)	73°23°	0%	3 mph5 km/h from ENE, gusts 5 mph9 km/h	81%	86%	0
Sun 8a	Cloudy	74°23° (likely 74°23° to 77°25°)	74°23°	0%	2 mph3 km/h from ENE, gusts 6 mph9 km/h	79%	82%	1
Sun 9a	Cloudy	76°24° (likely 76°24° to 79°26°)	76°24°	0%	2 mph3 km/h from ENE, gusts 6 mph10 km/h	74%	81%	2
Sun 10a	Cloudy	78°26° (likely 77°25° to 80°27°)	78°26°	0%	2 mph3 km/h from ENE, gusts 7 mph11 km/h	69%	75%	4
Sun 11a	Cloudy	80°27° (likely 78°26° to 81°27°)	82°28°	0%	6 mph10 km/h from ESE, gusts 8 mph12 km/h	65%	74%	6
Sun 12p	Cloudy	81°27° (likely 79°26° to 82°28°)	84°29°	20%, 0.02 in0.5 mm	6 mph10 km/h from ESE, gusts 9 mph15 km/h	63%	79%	7
Sun 1p	Showers	81°27° (likely 79°26° to 82°28°)	84°29°	20%, 0.02 in0.5 mm	6 mph10 km/h from ESE, gusts 10 mph16 km/h	64%	74%	8
Sun 2p	Showers	81°27° (likely 79°26° to 82°28°)	84°29°	20%, 0.02 in0.5 mm	5 mph8 km/h from ESE, gusts 10 mph16 km/h	65%	76%	7
Sun 3p	Showers	81°27° (likely 79°26° to 81°27°)	84°29°	20%, 0.02 in0.5 mm	5 mph8 km/h from ESE, gusts 10 mph16 km/h	66%	75%	5
Sun 4p	Showers	80°27° (likely 78°26° to 80°27°)	83°28°	20%, 0.02 in0.5 mm	5 mph8 km/h from ESE, gusts 10 mph17 km/h	68%	73%	3
Sun 5p	Showers	79°26° (likely 77°25° to 79°26°)	79°26°	20%, 0.02 in0.5 mm	5 mph8 km/h from E, gusts 10 mph16 km/h	72%	72%	1
Sun 6p	Mostly cloudy	77°25° (likely 75°24° to 77°25°)	77°25°	10%	5 mph8 km/h from E, gusts 8 mph12 km/h	77%	76%	0
Sun 7p	Mostly cloudy	75°24° (likely 74°23° to 75°24°)	75°24°	10%	5 mph8 km/h from E, gusts 6 mph10 km/h	81%	85%	0
Sun 8p	Mostly cloudy	75°24° (likely 74°23° to 75°24°)	75°24°	10%	5 mph8 km/h from E, gusts 7 mph11 km/h	83%	78%	0
Sun 9p	Mostly cloudy	75°24° (likely 73°23° to 75°24°)	75°24°	10%	5 mph8 km/h from E, gusts 8 mph13 km/h	82%	87%	0
Sun 10p	Mostly cloudy	75°24° (likely 73°23° to 75°24°)	75°24°	10%	5 mph8 km/h from E, gusts 8 mph13 km/h	81%	82%	0
Sun 11p	Mostly cloudy	75°24° (likely 73°23° to 75°24°)	75°24°	10%	6 mph10 km/h from NE, gusts 8 mph13 km/h	80%	69%	0
Mon 12a	Mostly cloudy	74°23° (likely 73°23° to 74°23°)	74°23°	0%	6 mph10 km/h from NE, gusts 7 mph12 km/h	80%	51%	0
Mon 1a	Mostly clear	74°23° (likely 73°23° to 74°23°)	74°23°	0%	6 mph10 km/h from NE, gusts 7 mph12 km/h	81%	27%	0
Mon 2a	Mostly cloudy	74°23° (likely 73°23° to 74°23°)	74°23°	0%	6 mph10 km/h from NE, gusts 7 mph11 km/h	82%	32%	0
Mon 3a	Mostly clear	73°23° (likely 72°22° to 73°23°)	73°23°	0%	6 mph10 km/h from NE, gusts 6 mph10 km/h	83%	49%	0
Mon 4a	Mostly cloudy	73°23° (likely 72°22° to 73°23°)	73°23°	0%	6 mph10 km/h from NE, gusts 6 mph10 km/h	84%	48%	0
Mon 5a	Mostly cloudy	73°23° (likely 72°22° to 73°23°)	73°23°	0%	7 mph11 km/h from ENE, gusts 7 mph11 km/h	84%	59%	0
Mon 6a	Partly sunny	73°23° (likely 72°22° to 73°23°)	73°23°	0%	7 mph11 km/h from ENE, gusts 8 mph12 km/h	84%	54%	0
Mon 7a	Partly sunny	73°23° (likely 72°22° to 74°23°)	73°23°	0%	7 mph11 km/h from ENE, gusts 8 mph12 km/h	84%	35%	0
Mon 8a	Partly sunny	74°23° (likely 74°23° to 76°24°)	74°23°	0%	7 mph11 km/h from ENE, gusts 8 mph13 km/h	82%	35%	1
Mon 9a	Partly sunny	76°24° (likely 75°24° to 79°26°)	76°24°	0%	7 mph11 km/h from ENE, gusts 9 mph15 km/h	78%	36%	3
Mon 10a	Partly sunny	77°25° (likely 76°24° to 80°27°)	77°25°	0%	7 mph11 km/h from ENE, gusts 9 mph15 km/h	74%	45%	4
Mon 11a	Partly sunny	79°26° (likely 77°25° to 81°27°)	82°28°	0%	7 mph11 km/h from E, gusts 9 mph15 km/h	71%	56%	5
Mon 12p	Showers	80°27° (likely 78°26° to 83°28°)	83°28°	30%, 0.07 in1.8 mm	7 mph11 km/h from E, gusts 9 mph14 km/h	69%	65%	6
Mon 1p	Cloudy	80°27° (likely 79°26° to 82°28°)	83°28°	30%, 0.07 in1.8 mm	7 mph11 km/h from E, gusts 9 mph15 km/h	69%	75%	6
Mon 2p	Cloudy	80°27° (likely 77°25° to 80°27°)	83°28°	30%, 0.07 in1.8 mm	7 mph11 km/h from E, gusts 10 mph16 km/h	69%	81%	4
Mon 3p	Showers	80°27° (likely 76°24° to 80°27°)	83°28°	30%, 0.07 in1.8 mm	7 mph11 km/h from E, gusts 10 mph16 km/h	70%	83%	2
Mon 4p	Showers	79°26° (likely 74°23° to 79°26°)	82°28°	30%, 0.07 in1.8 mm	7 mph11 km/h from E, gusts 9 mph15 km/h	73%	78%	1
Mon 5p	Showers	78°26° (likely 73°23° to 78°26°)	78°26°	30%, 0.07 in1.8 mm	9 mph14 km/h from ENE, gusts 9 mph14 km/h	76%	76%	1
Mon 6p	Showers	77°25° (likely 72°22° to 77°25°)	77°25°	60%, 0.12 in3 mm	9 mph14 km/h from ENE, gusts 11 mph17 km/h	81%	77%	0

Days ahead

Tap a day for its hours and the official wording.

Today, Oct 24. Cloudy. High 82°28°, low 73°23°. Rain 0.01 in0.3 mm, 20% chance. Forecasts agree.
1. Evening
  6 PM–midnight
  Showers, 75°24°
  Dry
2. Overnight
  midnight–6 AM
  Cloudy, 73°23°
  Dry
Official NWS forecast
Tonight: Isolated rain showers before midnight. Mostly cloudy, with a low around 73. North northwest wind 3 to 9 mph. Chance of precipitation is 20%.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
80°27°–83°28°
Low, likely
73°23°
Wind
7 mph12 km/h, gusts 20 mph32 km/h
UV peak
6
Tomorrow, Oct 25. Mostly cloudy. High 81°27°, low 73°23°. Rain 0.02 in0.5 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 74°23°
  Dry
2. Afternoon
  noon–6 PM
  Showers, 81°27°
  20% chance · 0.12 in3 mm
3. Evening
  6 PM–midnight
  Mostly cloudy, 75°24°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 73°23°
  Dry
Official NWS forecast
Day: Isolated rain showers after noon. Mostly cloudy, with a high near 81. East wind 2 to 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Night: Mostly cloudy, with a low around 73. East northeast wind around 7 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
79°26°–82°28°
Low, likely
73°23°
Wind
10 mph15 km/h, gusts 19 mph30 km/h
UV peak
8
Monday, Oct 26. Mostly cloudy. High 80°27°, low 73°23°. Rain 0.03 in0.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 74°23°
  Dry
2. Afternoon
  noon–6 PM
  Showers, 80°27°
  30% chance · 0.42 in11 mm
3. Evening
  6 PM–midnight
  Showers, 74°23°
  60% chance · 0.12 in3.1 mm
4. Overnight
  midnight–6 AM
  Partly cloudy, 73°23°
  Dry
Official NWS forecast
Day: Scattered rain showers after noon. Partly sunny, with a high near 80. East northeast wind around 9 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Night: A chance of rain showers. Mostly cloudy, with a low around 73. East wind 5 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
79°26°–83°28°
Low, likely
72°22°–73°23°
Wind
12 mph19 km/h, gusts 21 mph33 km/h
UV peak
6
Tuesday, Oct 27. Thunderstorms. High 80°27°, low 74°23°. Storms 0.06 in1.5 mm, 90% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 76°24°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 80°27°
  40% chance · 0.02 in0.4 mm
3. Evening
  6 PM–midnight
  Drizzle, 76°24°
  50% chance · 0.08 in1.9 mm
4. Overnight
  midnight–6 AM
  Cloudy, 74°23°
  60% chance · 0.05 in1.1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers before noon, then occasional showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a high near 80. South wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Night: Occasional showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 74. West southwest wind around 9 mph. Chance of precipitation is 90%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
77°25°–82°28°
Low, likely
71°22°–74°23°
Wind
13 mph21 km/h, gusts 26 mph41 km/h
UV peak
6
Wednesday, Oct 28. Thunderstorms. High 80°27°, low 74°23°. Storms 0.21 in5.3 mm, 80% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 77°25°
  50% chance · 0.01 in0.3 mm
2. Afternoon
  noon–6 PM
  Drizzle, 79°26°
  50% chance · 0.11 in2.9 mm
3. Evening
  6 PM–midnight
  Cloudy, 76°24°
  40% chance
4. Overnight
  midnight–6 AM
  Cloudy, 74°24°
  40% chance · 0.02 in0.4 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Occasional showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a high near 80. West wind 8 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Night: Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 74. West northwest wind 2 to 8 mph. Chance of precipitation is 80%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
78°26°–84°29°
Low, likely
73°23°–75°24°
Wind
18 mph30 km/h, gusts 31 mph49 km/h
UV peak
7
Thursday, Oct 29. Thunderstorms. High 80°27°, low 74°23°. Storms 0.22 in5.6 mm, 60% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 76°25°
  40% chance · 0.1 in2.5 mm
2. Afternoon
  noon–6 PM
  Partly sunny, 80°27°
  40% chance · 0.11 in2.7 mm
3. Evening
  6 PM–midnight
  Drizzle, 76°24°
  40% chance
4. Overnight
  midnight–6 AM
  Cloudy, 74°23°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Showers and thunderstorms likely. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 80. Northwest wind 2 to 7 mph. Chance of precipitation is 60%.
Night: Showers and thunderstorms likely. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 74. Northwest wind around 3 mph. Chance of precipitation is 60%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
79°26°–86°30°
Low, likely
74°23°–75°24°
Wind
18 mph29 km/h, gusts 26 mph41 km/h
UV peak
7
Friday, Oct 30. Showers. High 80°27°, low 73°23°. Rain 0.11 in2.8 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 76°24°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 81°27°
  50% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Drizzle, 76°24°
  40% chance · 0.08 in2.1 mm
4. Overnight
  midnight–6 AM
  Drizzle, 74°23°
  40% chance · 0.06 in1.6 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Scattered rain showers. Mostly cloudy, with a high near 80. Northwest wind 1 to 5 mph. Chance of precipitation is 50%.
Night: Mostly cloudy, with a low around 73. East northeast wind 5 to 8 mph. Chance of precipitation is 40%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
79°26°–83°28°
Low, likely
73°23°–74°23°
Wind
13 mph21 km/h, gusts 43 mph70 km/h
UV peak
4
Saturday, Oct 31. Mostly cloudy. High 79°26°, low 73°23°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 75°24°
  40% chance · 0.05 in1.3 mm
2. Afternoon
  noon–6 PM
  Cloudy, 77°25°
  40% chance · 0.13 in3.4 mm
3. Evening
  6 PM–midnight
  Drizzle, 74°23°
  30% chance · 0.05 in1.4 mm
4. Overnight
  midnight–6 AM
  Mostly clear, 73°23°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 79. East northeast wind around 8 mph. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
73°23°–79°26°
Low, likely
71°22°–74°23°
Wind
15 mph24 km/h, gusts 42 mph67 km/h
UV peak
3
Sunday, Nov 1. Drizzle. High 79°26°, low 72°22°. Rain 0.11 in2.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 75°24°
  20% chance
2. Afternoon
  noon–6 PM
  Drizzle, 78°26°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 74°23°
  20% chance · 0.02 in0.4 mm
4. Overnight
  midnight–6 AM
  Drizzle, 72°22°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
76°24°–82°28°
Low, likely
70°21°–74°23°
Wind
15 mph24 km/h, gusts 28 mph46 km/h
UV peak
7
Monday, Nov 2. Drizzle. High 78°26°, low 71°22°. Rain 0.15 in3.8 mm, 30% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Drizzle, 74°23°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 78°26°
  20% chance · 0.03 in0.8 mm
3. Evening
  6 PM–midnight
  Drizzle, 73°23°
  20% chance · 0.04 in1.1 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
77°25°–80°27°
Low, likely
70°21°–73°23°
Wind
22 mph36 km/h, gusts 40 mph64 km/h
UV peak
7

10 days15 days30 days

The outlook

Today
Dry, high 82°, low 73°.
Tomorrow
Dry, high 81°, low 73°.
Monday
Dry, high 80°, low 73°.
Rest of week
Highs 78–80°; chance of precipitation on Tuesday, Wednesday, Thursday, Friday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (HFO) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Paauau Gulch near Pahala

15 mi

Below flood stage

Level: 3.0 ft
Flow: 101 cfs

Reading from Sat 6:35 PM · NWS gauge page

Sun & moon

Sun

Daylight: 11 h 34 min; Losing 1 min 1 s a day; shortest Dec 21, 34 min less
Golden hour: 5:23–6:06 PM; Morning 6:06–6:49 AM
Blue hour: 6:06–6:15 PM; Morning 5:57–6:06 AM; first light 5:57 AM

Stars tonight? Poor

Clouds most of the night (about 85% cover).

Moon

Waxing gibbous

99% lit · growing

Today: sets 4:54 AM · rises 4:53 PM
Full moon: Oct 25
New moon: Nov 8

Looking north from Discovery Harbour. The highest point on the skyline is about 12,900 ft, 27 mi away.Skyline from USGS elevation data, heights drawn up to 4× taller. Sky, sun and moon as they are now.

1 active weather alert

Hydrologic Outlook

Discovery Harbour, HI weather

Next 2 hours