San Lorenzo River (CA) at Big Trees
12 mi- Level
- 3.2 ft
- Flow
- 18 cfs
Forecast peak 3.2 ft Sat 4 PM
Reading from Sat 2:30 PM · NWS gauge page
Appearance
Ends in 4 days 23 h
Issued for this forecast zone · National Weather Service San Francisco CA
What
Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways.
Impacts
High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water and waves farther up the beach than normal, restricting escape from beaches and coastal areas.
Additional details
At the San Francisco tidal gauge, high tide is expected to be 1.5 ft above normal (7.3 ft MLLW) at 11:07 AM Sunday 10/25, 1.6 ft above normal (7.4 ft MLLW) at 11:39 AM Monday 10/26, 1.8 ft above normal (7.6 ft MLLW) at 12:15 PM Tuesday 10/27, 1.9 ft above normal (7.7 ft MLLW) at 12:56 PM Wednesday 10/28, and 1.7 ft above normal (7.5 ft MLLW) at 01:43 PM Thursday 10/29. These predictions include up to 1.0 ft of surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
Precautionary actions
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Areas: San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
See it on weather.gov (opens in a new tab)Observed 3:35 PM PDT at KWVI
Sunny and 72°22°, 9°5° colder than a typical Oct 24.
Today: low 54°12° (likely 48°9° to 54°12°), high 64°18° (likely 64°18° to 70°21°).
Now 72°22°
Sunny
No precipitation expected in the next 2 hours.
From forecast models
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 3p | Sunny | 63°17° (likely 63°17° to 70°21°) | 63°17° | 0% | 6 mph10 km/h from W, gusts 8 mph13 km/h | 76% | 1% | 4 |
| Sat 4p | Sunny | 63°17° (likely 63°17° to 69°21°) | 63°17° | 0% | 7 mph11 km/h from W, gusts 8 mph13 km/h | 74% | 0% | 3 |
| Sat 5p | Sunny | 64°18° (likely 64°18° to 68°20°) | 64°18° | 0% | 7 mph11 km/h from W, gusts 8 mph12 km/h | 75% | 0% | 2 |
| Sat 6p | Clear | 62°17° (likely 62°17° to 66°19°) | 62°17° | 0% | 5 mph8 km/h from W, gusts 6 mph10 km/h | 78% | 0% | 1 |
| Sat 7p | Clear | 62°17° (likely 60°16° to 63°17°) | 62°17° | 0% | 3 mph5 km/h from N, gusts 3 mph5 km/h | 79% | 0% | 0 |
| Sat 8p | Clear | 61°16° (likely 58°14° to 61°16°) | 61°16° | 0% | 5 mph8 km/h from ENE, gusts 5 mph8 km/h | 80% | 0% | 0 |
| Sat 9p | Clear | 60°16° (likely 56°13° to 60°16°) | 60°16° | 0% | 6 mph10 km/h from ENE, gusts 9 mph14 km/h | 79% | 0% | 0 |
| Sat 10p | Clear | 59°15° (likely 55°13° to 59°15°) | 59°15° | 0% | 9 mph14 km/h from ENE, gusts 8 mph12 km/h | 77% | 2% | 0 |
| Sat 11p | Clear | 58°14° (likely 54°12° to 58°14°) | 58°14° | 0% | 9 mph14 km/h from NE, gusts 7 mph11 km/h | 78% | 0% | 0 |
| Sun 12a | Clear | 57°14° (likely 53°12° to 57°14°) | 57°14° | 0% | 9 mph14 km/h from NE, gusts 5 mph9 km/h | 77% | 0% | 0 |
| Sun 1a | Clear | 57°14° (likely 53°12° to 57°14°) | 57°14° | 0% | 8 mph13 km/h from NNE, gusts 5 mph8 km/h | 77% | 0% | 0 |
| Sun 2a | Clear | 56°13° (likely 52°11° to 56°13°) | 57°14° | 0% | 7 mph11 km/h from N, gusts 4 mph7 km/h | 77% | 0% | 0 |
| Sun 3a | Clear | 56°13° (likely 52°11° to 56°13°) | 56°13° | 0% | 6 mph10 km/h from N, gusts 4 mph7 km/h | 75% | 5% | 0 |
| Sun 4a | Partly cloudy | 56°13° (likely 52°11° to 56°13°) | 56°13° | 0% | 5 mph8 km/h from NNE, gusts 4 mph7 km/h | 76% | 16% | 0 |
| Sun 5a | Partly cloudy | 56°13° (likely 52°11° to 56°13°) | 56°13° | 0% | 5 mph8 km/h from NE, gusts 4 mph7 km/h | 75% | 27% | 0 |
| Sun 6a | Partly cloudy | 54°12° (likely 51°11° to 56°13°) | 54°12° | 0% | 5 mph8 km/h from NE, gusts 5 mph8 km/h | 75% | 50% | 0 |
| Sun 7a | Mostly sunny | 55°13° (likely 51°11° to 56°13°) | 55°13° | 0% | 5 mph8 km/h from NE, gusts 4 mph7 km/h | 75% | 54% | 0 |
| Sun 8a | Partly sunny | 55°13° (likely 51°11° to 57°14°) | 55°13° | 0% | 5 mph8 km/h from NE, gusts 4 mph6 km/h | 76% | 60% | 0 |
| Sun 9a | Partly sunny | 57°14° (likely 56°13° to 60°16°) | 57°14° | 0% | 2 mph3 km/h from ENE, gusts 4 mph6 km/h | 77% | 70% | 1 |
| Sun 10a | Partly sunny | 60°16° (likely 60°16° to 64°18°) | 60°16° | 0% | 1 mph2 km/h from ESE, gusts 3 mph5 km/h | 75% | 75% | 2 |
| Sun 11a | Partly sunny | 61°16° (likely 61°16° to 67°19°) | 61°16° | 0% | 1 mph2 km/h from SSW, gusts 5 mph7 km/h | 73% | 75% | 3 |
| Sun 12p | Partly sunny | 62°17° (likely 62°17° to 69°21°) | 62°17° | 0% | 2 mph3 km/h from WSW, gusts 6 mph9 km/h | 74% | 75% | 4 |
| Sun 1p | Cloudy | 62°17° (likely 62°17° to 70°21°) | 62°17° | 0% | 5 mph8 km/h from WSW, gusts 8 mph12 km/h | 78% | 76% | 4 |
| Sun 2p | Cloudy | 63°17° (likely 63°17° to 70°21°) | 63°17° | 0% | 6 mph10 km/h from WSW, gusts 10 mph16 km/h | 79% | 81% | 4 |
| Sun 3p | Cloudy | 64°18° (likely 64°18° to 69°21°) | 64°18° | 0% | 8 mph13 km/h from WSW, gusts 11 mph18 km/h | 81% | 80% | 4 |
| Sun 4p | Cloudy | 63°17° (likely 63°17° to 68°20°) | 63°17° | 0% | 8 mph13 km/h from WSW, gusts 10 mph16 km/h | 81% | 79% | 2 |
| Sun 5p | Cloudy | 62°17° (likely 62°17° to 66°19°) | 62°17° | 0% | 8 mph13 km/h from WSW, gusts 9 mph14 km/h | 82% | 76% | 1 |
| Sun 6p | Partly cloudy | 61°16° (likely 60°16° to 64°18°) | 61°16° | 0% | 5 mph8 km/h from WSW, gusts 8 mph13 km/h | 87% | 78% | 0 |
| Sun 7p | Cloudy | 61°16° (likely 58°14° to 61°16°) | 61°16° | 0% | 2 mph3 km/h from SW, gusts 6 mph10 km/h | 86% | 87% | 0 |
| Sun 8p | Cloudy | 60°16° (likely 58°14° to 60°16°) | 61°16° | 0% | 1 mph2 km/h from SW, gusts 4 mph7 km/h | 87% | 86% | 0 |
| Sun 9p | Cloudy | 60°16° (likely 57°14° to 60°16°) | 60°16° | 0% | 1 mph2 km/h from SW, gusts 4 mph6 km/h | 87% | 78% | 0 |
| Sun 10p | Mostly cloudy | 59°15° (likely 56°13° to 59°15°) | 59°15° | 0% | 2 mph3 km/h from WSW, gusts 3 mph6 km/h | 86% | 69% | 0 |
| Sun 11p | Mostly cloudy | 58°14° (likely 55°13° to 58°14°) | 58°14° | 0% | 3 mph5 km/h from E, gusts 3 mph5 km/h | 88% | 39% | 0 |
| Mon 12a | Mostly cloudy | 57°14° (likely 55°13° to 57°14°) | 57°14° | 0% | 3 mph5 km/h from E, gusts 3 mph5 km/h | 90% | 28% | 0 |
| Mon 1a | Clear | 56°13° (likely 53°12° to 56°13°) | 57°14° | 0% | 3 mph5 km/h from E, gusts 3 mph5 km/h | 90% | 21% | 0 |
| Mon 2a | Mostly clear | 56°13° (likely 52°11° to 56°13°) | 56°13° | 0% | 5 mph8 km/h from NE, gusts 4 mph7 km/h | 91% | 38% | 0 |
| Mon 3a | Clear | 56°13° (likely 52°11° to 56°13°) | 56°13° | 0% | 5 mph8 km/h from NE, gusts 5 mph9 km/h | 90% | 30% | 0 |
| Mon 4a | Clear | 55°13° (likely 50°10° to 55°13°) | 55°13° | 0% | 5 mph8 km/h from NE, gusts 6 mph9 km/h | 91% | 25% | 0 |
| Mon 5a | Clear | 54°12° (likely 50°10° to 54°12°) | 54°12° | 0% | 5 mph8 km/h from NNE, gusts 4 mph7 km/h | 92% | 23% | 0 |
| Mon 6a | Clear | 54°12° (likely 48°9° to 54°12°) | 54°12° | 0% | 5 mph8 km/h from NNE, gusts 5 mph8 km/h | 94% | 21% | 0 |
| Mon 7a | Sunny | 54°12° (likely 48°9° to 54°12°) | 54°12° | 0% | 5 mph8 km/h from NNE, gusts 6 mph9 km/h | 94% | 24% | 0 |
| Mon 8a | Partly sunny | 54°12° (likely 48°9° to 54°12°) | 54°12° | 0% | 5 mph8 km/h from N, gusts 4 mph7 km/h | 94% | 36% | 0 |
| Mon 9a | Sunny | 55°13° (likely 54°12° to 56°13°) | 55°13° | 0% | 5 mph8 km/h from N, gusts 4 mph7 km/h | 93% | 26% | 1 |
| Mon 10a | Sunny | 57°14° (likely 57°14° to 60°16°) | 57°14° | 0% | 5 mph8 km/h from N, gusts 4 mph6 km/h | 91% | 26% | 2 |
| Mon 11a | Sunny | 59°15° (likely 59°15° to 63°17°) | 59°15° | 0% | 2 mph3 km/h from NW, gusts 6 mph10 km/h | 89% | 7% | 3 |
| Mon 12p | Sunny | 60°16° (likely 60°16° to 66°19°) | 60°16° | 0% | 2 mph3 km/h from NW, gusts 6 mph9 km/h | 88% | 8% | 4 |
| Mon 1p | Sunny | 61°16° (likely 61°16° to 68°20°) | 61°16° | 0% | 2 mph3 km/h from NW, gusts 6 mph9 km/h | 87% | 9% | 5 |
| Mon 2p | Mostly sunny | 62°17° (likely 62°17° to 69°21°) | 62°17° | 0% | 8 mph13 km/h from WNW, gusts 7 mph12 km/h | 86% | 9% | 5 |
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Today: Sunny, with a high near 64. West wind around 7 mph.
Tonight: Mostly clear. Low around 54, with temperatures rising to around 56 overnight. North northeast wind 3 to 9 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Day: Mostly sunny. High near 64, with temperatures falling to around 62 in the afternoon. South southeast wind 1 to 8 mph.
Night: Mostly cloudy, with a low around 53. West northwest wind 1 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Day: Mostly sunny, with a high near 63. North northwest wind 2 to 15 mph, with gusts as high as 21 mph.
Night: Mostly clear, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 62.
Night: Partly cloudy, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 60.
Night: Mostly cloudy, with a low around 53.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 59.
Night: A slight chance of rain after 5am. Partly cloudy, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain. Mostly sunny, with a high near 57.
Night: A chance of rain. Mostly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
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.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
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.
Dry, high 64°, low 54°.
Dry, high 64°, low 53°.
Dry, high 63°, low 51°.
Mostly dry, highs 57–66°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (MTR) (opens in a new tab)
No meaningful changes from yesterday’s forecast.
Forecast peak 3.2 ft Sat 4 PM
Reading from Sat 2:30 PM · NWS gauge page
Reading from Sat 2:30 PM · NWS gauge page
Reading from Sat 2:30 PM · NWS gauge page
Reading from Sat 2 PM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
About 69% less heating than a typical week.
Heating degree days, base 65°F
Dry air outside (dew point 46°F).
Today, 4:00 PM–9:00 PM
Good stretch to open the windows.
Today’s expected high is 9°5° colder than typical.
On average 1°0° warmer than normal (daily mean temperature).
Rio del Mar weather by month: normals, records, snow and freeze dates
Sunrise 7:23 AM, sunset 6:19 PM.
Clear 6:45 PM–5 AM, but the moon is 99% lit and up.
Waxing gibbous
98% lit · growing