Should you sail in Annapolis Harbour?
NO-GO — Don't sail here today. Sailing score 45/100 · United States. Thunderstorms possible today. Marine data unavailable. Best window starts around Today 7:00 AM.
About sailing in Annapolis Harbour
Annapolis sits on the Severn River where it meets Chesapeake Bay — home to the U.S. Naval Academy and a year-round cruising community.
Best time to sail
April through October; peak cruising runs May–September with reliable thermal winds.
Sailing notes
Naval Academy security zones and drawbridge schedules affect routes; shoaling near Spa Creek entrance needs attention.
Wind and local conditions
Thermal southwest breezes on summer afternoons; frontal northerlies and northeasters in shoulder seasons.
What 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?
Annapolis Harbour
NO-GO
Don't sail here today — thunderstorms possible today
45
Sailing score
Next 24 hours
Hourly sailing comfort at the harbor — today and tomorrow are local to the marina.
Best intervals: Today 7:00 AM – 6:00 PM · Today 8:00 PM – Tomorrow 7:00 AM
Boat type
Showing Keelboat wind thresholds
Hover or tap an hour for details · Next 24 hours
At harbor: Sat, Jul 4, 7:00 AM (Eastern Daylight Time)
The call
Not a good day to sail near Annapolis Harbour — thunderstorms possible today.
Location
Annapolis Harbour, United States
Today's seas
No marine wave data for this point. Try searching closer to open water or a coastal waypoint. Offshore forecasts need a sea position, not an inland pin.
Conditions at a glance
What stood out in the forecast
Wind
Good10 kt · BF 4
Sustained to 10 kt · gusts to 19 kt · BF 5
Beaufort 5 — 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.
Rain
Poor29%
18.7 mm total · 29% peak chance · 2 wet hour(s)
2 hour(s) with meaningful rain risk — expect reduced visibility, saturated decks, and slower reaction times. Full waterproof layers and clear eyewear help; consider delaying if comfort and sightlines matter for your route.
Air temperature
Poor39°C
Air 26–39°C · feels like 26–44°C
Feels-like 26–44°C with spray — dress for immersion, not the marina thermometer. Cold shock and hypothermia are real risks if someone goes overboard; carry spare layers in a dry bag.
Visibility
Poor0.9 nm
Lowest 0.9 nm · best 34 nm today
Sight distance down to about 0.9 nm — treat it like restricted visibility: slower speed, extra lookouts, sound signals where rules require, and AIS/radar if fitted. Ferry lanes and busy harbors deserve extra margin.
Barometric pressure
Good1013 hPa
1013 hPa → steady (2 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 8
Very high index — limit bare-skin time on deck. · peak near 14:00
UV 8.0 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 NO-GO
What pushed the score — how we score
Thunderstorms possible today
HighThunder or heavy convective weather in the forecast — stay ashore.
Marine data unavailable
HighWave forecast could not be loaded for this point. Try a location closer to open water.
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 v1.1.19 · open_meteo marine + forecast · Evaluated Sat, Jul 4, 7:59 AM (Eastern Daylight Time) · limited marine data
What should I do?
What to do next
Best window starts around Today 7:00 AM
Conditions should improve around Today 7:00 AM (Eastern Daylight Time) — consider delaying departure until then.
At harbor: Sat, Jul 4, 7:00 AM (Eastern Daylight Time)
Wait for storms to pass
Thunderstorms and lightning are not worth the risk on a recreational day sail.
Day outlook
2-day · °C, kt, m, nm, mm
Today
Poor
39°C / 26°C
18.7 mm
Not ideal: storm conditions (remaining hours).
Tomorrow
Poor
36°C / 25°C
2.2 mm · 69%
Not ideal: breezy conditions.
Forecast data from third-party providers.