San Francisco Bay sailing weather today — go/no-go
GO — Yes — go sailing. Sailing score 100/100 · United States. Similar sailing quality expected over the next 24 hours.
About sailing in San Francisco Bay
San Francisco Bay (SF Bay) is one of the world's great urban sailing arenas—Golden Gate pressure gradients, Alcatraz tides, and summer seabreeze that builds from the Pacific through the Gate. Clubs race on the cityfront; cruisers reach Angel Island and Sausalito from Berkeley or Emeryville marinas. Sailors searching SF sailing weather come here for a live read on whether the Gate and cityfront are go, caution, or no-go today.
Best time to sail
April through October delivers reliable afternoon westerlies; September and October often bring the warmest sailing weather. Winter fronts bring steep chop and reduced visibility in the central bay.
Sailing notes
Treat the Gate as a separate passage—ebb against westerly swell stacks steep seas. Commercial traffic lanes east of Alcatraz need wide clearance. Fog can drop visibility below 100 m in summer mornings while the East Bay stays clear.
San Francisco Bay wind and sailing weather
Post-noon seabreeze typically fills 15–25 knots from the west through the Golden Gate, while mornings stay light and foggy—classic SF Bay sailing conditions. Diablo winds in fall can gust 35+ knots with little warning. Inside the bay, wind shadows behind the Berkeley hills and Angel Island create deceptive calm patches.
Official marine forecast for San Francisco Bay
Cross-check today's SailCall verdict with the official marine forecast, warnings, and tides before you leave the dock.
San Francisco Bay sailing FAQ
When is San Francisco Bay windiest for sailing?
Afternoons May through September usually peak between 2 and 5 p.m. when the seabreeze fills; many clubs schedule races to match that window.
Where can I check SF sailing weather for today?
This SailCall page is a live SF Bay sailing weather and conditions check: wind, seas, visibility, and a go/caution/no-go score updated from the forecast—not just a static climate overview.
What are sailing conditions like in San Francisco Bay today?
SailCall publishes a live go, caution, or no-go sailing conditions verdict for San Francisco Bay based on wind, seas, visibility, and timing. Check the live score on this page before you leave the dock.
When is the best time to sail in San Francisco Bay?
April through October delivers reliable afternoon westerlies; September and October often bring the warmest sailing weather. Winter fronts bring steep chop and reduced visibility in the central bay.
What wind patterns should I expect in San Francisco Bay?
Post-noon seabreeze typically fills 15–25 knots from the west through the Golden Gate, while mornings stay light and foggy—classic SF Bay sailing conditions. Diablo winds in fall can gust 35+ knots with little warning. Inside the bay, wind shadows behind the Berkeley hills and Angel Island create deceptive calm patches.
Is it good for sailing in San Francisco Bay today?
Yes — Sailing Score 100/100.
Nearby sailing harbors
← All harborsWhat SailCall covers
Wind, seas, rain, visibility, and pressure for today's coastal day sail, using WeatherAPI.com forecast and marine data. Wave outlook is included; tide times are not yet — check a local tide table before harbor entry. Not a chart plotter or passage planner.
Should I go sailing today?
San Francisco Bay
GO
Yes — go sailing
100
Sailing score
Next 24 hours
Hourly sailing comfort at the harbor — today and tomorrow are local to the marina.
Best intervals: Today 8:00 AM – Tomorrow 8:00 AM
Boat type
Showing Keelboat wind thresholds
Hover or tap an hour for details · Next 24 hours
At harbor: Sun, Oct 4, 8:00 AM (Pacific Daylight Time)
The call
Conditions near San Francisco Bay look favorable for a day sail today.
Location
San Francisco Bay, United States
Today's seas
Daily wave outlook from WeatherAPI.com. Waves and swell, not tides.
- Significant waves
- 0.0 m
- Relatively calm on the surface. Still check wind against tide at the harbor mouth.
- Swell
- 0.0 m
- Swell period and direction affect how the boat rolls and whether wind waves stack on top.
Conditions at a glance
What stood out in the forecast
Wind
Good8 kt · BF 3
Sustained to 8 kt · gusts to 12 kt · BF 4
Beaufort 4 — a workable breeze for most day sails. Watch for funneling between headlands and tall buildings near harbors; local gusts can exceed the open-water forecast.
Seas
Good0.0 m
Significant wave height 0.0 m
Relatively modest seas today (swell ~0.0 m). Still evaluate harbor entrance and wind against any tidal stream using local pilot notes.
Rain
Good10%
0.0 mm total · 10% peak chance · 0 wet hour(s)
Little rain expected — one less factor stealing visibility and grip on deck. Still pack a light jacket; conditions change faster on the water than ashore.
Air temperature
Good24°C
Air 17–24°C · feels like 16–24°C
Comfortable air temperatures for deck work, but water temperature may still be much colder — a dip without proper gear can shock even on a warm day.
Visibility
Good5.4 nm
Lowest 5.4 nm · best 5.4 nm today
Generally clear sightlines (about 10.0–5.4 nm). Good for spotting traffic and shoreline references — still verify charted marks; glare and spray can fool you even on “clear” days.
Barometric pressure
Good1013 hPa
1013 hPa → steady
Pressure is steady — no strong synoptic system pushing through on this snapshot. Local wind, sea breeze, and geography still dominate near shore.
UV / sun
GoodUV 4
Moderate index — standard protection recommended. · peak near 12:00
Lower UV today, but reflection off water still adds exposure. Sunglasses and SPF remain cheap insurance on the water.
Why we said GO
What pushed the score — how we score
How we decided
We score sailing conditions with fixed thresholds, so you can see why we picked go, caution, or no-go. Official charts, tide books, and your own judgment still run the show.
- GO — sailing score ≥70 with no critical blockers
- CAUTION — score 45–69, or manageable risks
- NO-GO — score <45 or dangerous wind/seas/storms
Engine v1.2.0 · WeatherAPI.com marine + forecast · Evaluated Sun, Oct 4, 8:10 AM (Pacific Daylight Time) (cached)
What should I do?
What to do next
Check local tide tables
SailCall does not include tide data yet — verify harbor depth before you go.
At harbor: Sun, Oct 4, 8:00 AM (Pacific Daylight Time)
Day outlook
2-day · °C, kt, m, nm, mm
Today
Good
24°C / 18°C
No rain
Favorable sailing conditions expected (remaining hours).
Tomorrow
Good
22°C / 17°C
No rain
Favorable sailing conditions expected.
Forecast data from third-party providers.
Cached forecast · updated recently