Charleston Harbor sailing conditions today
NO-GO — Don't sail here today. Sailing score 65/100 · United States. Dangerous wind for day sailing. Better window tomorrow around 12:00 AM.
About sailing in Charleston Harbor
Charleston Harbor opens to the Atlantic past Fort Sumter, with historic waterfront, marsh creeks, and warm Lowcountry sailing.
Best time to sail
March through November; spring and fall bring pleasant temperatures and steady breezes.
Sailing notes
Shifting sandbars near harbor mouth; summer thunderstorms build quickly — plan afternoon returns.
Charleston Harbor wind and sailing weather
Sea breezes from the south and southeast in summer; frontal passages bring gusty westerlies and northerlies.
Charleston Harbor sailing FAQ
What are sailing conditions like in Charleston Harbor today?
SailCall publishes a live go, caution, or no-go sailing conditions verdict for Charleston Harbor 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 Charleston Harbor?
March through November; spring and fall bring pleasant temperatures and steady breezes.
What wind patterns should I expect in Charleston Harbor?
Sea breezes from the south and southeast in summer; frontal passages bring gusty westerlies and northerlies.
Is Charleston Harbor in United States suitable for day sailing?
Charleston Harbor 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 Charleston Harbor?
No — Sailing Score 65/100. Dangerous wind for day sailing
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?
Charleston Harbor
NO-GO
Don't sail here today — dangerous wind for day sailing
65
Sailing score
Next 24 hours
Hourly sailing comfort at the harbor — today and tomorrow are local to the marina.
No strong sailing windows in the next 24 hours.
Boat type
Showing Keelboat wind thresholds
Hover or tap an hour for details · Next 24 hours
At harbor: Tue, Aug 18, 12:00 AM (Eastern Daylight Time)
The call
Not a good day to sail near Charleston Harbor — dangerous wind for day sailing. Conditions may improve tomorrow early morning.
Location
Charleston Harbor, 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
Poor26 kt · BF 6
Sustained to 26 kt · gusts to 30 kt · BF 7
Gusts near Beaufort 7 exceed comfortable day-sail limits for most crews. Consider postponing, or stay in protected water with a well-reefed rig and everyone in PFDs. Gusts hit hardest when leaving the lee of land or during squalls.
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
Poor77%
15.3 mm total · 77% peak chance · 21 wet hour(s)
21 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
Fair30°C
Air 13–30°C · feels like 4–38°C
Feels-like 4–38°C once wind and humidity count. Layer so you can cool off in sun and warm up when wet; shivering crews make poor decisions.
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
Good1023 hPa
1023 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 9.3
Very high index — limit bare-skin time on deck. · peak near 13:00
UV 9.3 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
Dangerous wind for day sailing
HighSustained winds up to 26 kt with gusts to 30 kt in the next 24 hours.
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 Mon, Aug 17, 3:28 AM (Eastern Daylight Time)
What should I do?
What to do next
Better window tomorrow around 12:00 AM
Conditions should improve around Tomorrow 12:00 AM (Eastern Daylight Time) — consider delaying departure until then.
At harbor: Tue, Aug 18, 12:00 AM (Eastern Daylight Time)
Stay ashore today
Wind or seas exceed comfortable day-sail limits for your boat and experience level.
Day outlook
2-day · °C, kt, m, nm, mm
Today
Poor
30°C / 13°C
15.3 mm · 77% · 26 kt · BF 6
Not ideal: very strong wind (remaining hours).
Tomorrow
Poor
13°C / 13°C
0.0 mm · 17 kt · BF 5
Not ideal: breezy conditions.
Forecast data from third-party providers.