San Francisco Bay sailing conditions today
GO — Yes — go sailing. Sailing score 94/100 · United States. Better window around Today 11:00 AM.
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.
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 San Francisco Bay in United States suitable for day sailing?
San Francisco Bay is a popular day-sail venue in United States. Check the live SailCall verdict for today's wind, seas, sailing score, and go/no-go recommendation before you leave the dock.
Is it good for sailing in San Francisco Bay?
Yes — Sailing Score 94/100.
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
94
Sailing score
Next 24 hours
Hourly sailing comfort at the harbor — today and tomorrow are local to the marina.
Best intervals: Today 11:00 AM – 2:00 PM · Today 3:00 PM – 6:00 PM
Boat type
Showing Keelboat wind thresholds
Hover or tap an hour for details · Next 24 hours
At harbor: Tue, Aug 18, 11:00 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
Good13 kt · BF 4
Sustained to 13 kt · gusts to 16 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
Fair30%
0.0 mm total · 30% peak chance · 12 wet hour(s)
Showers possible across 12 hour(s). Light rain is manageable with good gear; heavy bursts can obscure marks and other traffic — keep a hand on the plotter or chart.
Air temperature
Good17°C
Air 14–17°C · feels like 12–17°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
Good1015 hPa
1015 hPa → steady (3 hPa change)
Pressure is steady — no strong synoptic system pushing through on this snapshot. Local wind, sea breeze, and geography still dominate near shore.
UV / sun
PoorUV 9.2
Very high index — limit bare-skin time on deck. · peak near 13:00
UV 9.2 is very high — water reflection adds exposure you do not feel on land. Broad-spectrum SPF, hat, lip protection, and hydration reduce fatigue; consider shade breaks if you are out all day.
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 Tue, Aug 18, 7:20 AM (Pacific Daylight Time)
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: Tue, Aug 18, 11:00 AM (Pacific Daylight Time)
Day outlook
2-day · °C, kt, m, nm, mm
Today
Fair
17°C / 14°C
0.0 mm · 30% · 13 kt · BF 4
Sail with preparation: breezy conditions (remaining hours).
Tomorrow
Fair
18°C / 15°C
0.1 mm
Sail with preparation: rain in forecast.
Forecast data from third-party providers.