Should you sail in Simpson Bay?
CAUTION — Sail only if you are experienced and prepared. Sailing score 65/100 · Saint Martin. Strong wind — experienced crew only. Marine data unavailable. Better window around Today 12:00 PM.
About sailing in Simpson Bay
Simpson Bay Lagoon straddles Dutch and French Saint Martin — a hub for Caribbean charter fleets and island-hopping.
Best time to sail
December through April for steady trades; avoid peak hurricane months August through October.
Sailing notes
Shallow lagoon entrances and bridge openings require timing; busy traffic near Princess Juliana airport approach.
Wind and local conditions
Northeast trades 15–25 knots in winter; summer trades lighten with occasional tropical wave activity.
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?
Simpson Bay
CAUTION
Sail only if you are experienced and prepared
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: Sat, Jul 4, 12:00 PM (Atlantic Standard Time)
The call
You could sail near Simpson Bay today, but strong wind — experienced crew only.
Location
Simpson Bay, Saint Martin
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
Fair20 kt · BF 5
Sustained to 20 kt · gusts to 25 kt · BF 6
Beaufort 6 — manageable for experienced crews but not relaxing. Reef before open water, plan a route with lee shore options, and expect harder docking and mooring picks.
Rain
Good4%
0.0 mm total · 4% 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
Fair29°C
Air 28–29°C · feels like 28–31°C
Feels-like 28–31°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
Good11 nm
Lowest 11 nm · best 21 nm today
Generally clear sightlines (about 20.5–21 nm). Good for spotting traffic and shoreline references — still verify charted marks; glare and spray can fool you even on “clear” days.
Barometric pressure
Good1018 hPa
1018 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
PoorUV 9
Very high index — limit bare-skin time on deck. · peak near 13:00
UV 9.0 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 CAUTION
What pushed the score — how we score
Strong wind — experienced crew only
HighWinds up to 20 kt, gusts to 25 kt. Reef early and avoid exposed passages.
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 (Atlantic Standard Time) · limited marine data
What should I do?
What to do next
Better window around Today 12:00 PM
Conditions should improve around Today 12:00 PM (Atlantic Standard Time) — consider delaying departure until then.
At harbor: Sat, Jul 4, 12:00 PM (Atlantic Standard Time)
Reef early and wear PFDs
Reduce sail area before leaving the harbor and keep crew in life jackets.
Consider a sheltered route
Stay inside the bay or in the lee of the land if you go out.
Day outlook
2-day · °C, kt, m, nm, mm
Today
Poor
29°C / 28°C
No rain · 20 kt · BF 5
Not ideal: strong wind or gusts (remaining hours).
Tomorrow
Poor
28°C / 27°C
No rain · 20 kt · BF 5
Not ideal: strong wind or gusts.
Forecast data from third-party providers.