SailCall

Simpson Bay sailing conditions today

GO — Yes — go sailing. Sailing score 80/100 · Saint Martin. Strong wind — experienced crew only. Best window starts around Today 4:00 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.

Simpson Bay wind and sailing weather

Northeast trades 15–25 knots in winter; summer trades lighten with occasional tropical wave activity.

Simpson Bay sailing FAQ

What are sailing conditions like in Simpson Bay today?

SailCall publishes a live go, caution, or no-go sailing conditions verdict for Simpson 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 Simpson Bay?

December through April for steady trades; avoid peak hurricane months August through October.

What wind patterns should I expect in Simpson Bay?

Northeast trades 15–25 knots in winter; summer trades lighten with occasional tropical wave activity.

Is Simpson Bay in Saint Martin suitable for day sailing?

Simpson Bay is a popular day-sail venue in Saint Martin. 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 Simpson Bay?

Yes — Sailing Score 80/100. Strong wind — experienced crew only

Nearby sailing harbors

← All harbors

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

GO

Yes — go sailing

80

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

Tomorrow
Now9pmTmr 3amTmr 9amTmr 3pm
GoodFairPoor

Hover or tap an hour for details · Next 24 hours

Best window starts around Today 4:00 PM

At harbor: Wed, Aug 12, 4:00 PM (Atlantic Standard Time)

The call

Conditions near Simpson Bay look favorable for a day sail today.

Location

Simpson Bay, Saint Martin

18.0425°, -63.0960°Open in OpenStreetMap

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

Fair

22 kt · BF 6

Sustained to 22 kt · gusts to 30 kt · BF 7

Beaufort 7 — 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.

Seas

Good

0.0 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

Poor

68%

2.3 mm total · 68% peak chance · 10 wet hour(s)

10 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

Fair

28°C

Air 28–28°C · feels like 28–33°C

Feels-like 28–33°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

Good

5.4 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

Good

1016 hPa

1016 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

Poor

UV 10.4

Very high index — limit bare-skin time on deck. · peak near 13:00

UV 10.4 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

  • Strong wind — experienced crew only

    High

    Winds up to 22 kt, gusts to 30 kt. Reef early and avoid exposed passages.

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 Wed, Aug 12, 3:34 PM (Atlantic Standard Time)

What should I do?

What to do next

  • Reef early and wear PFDs

    Reduce sail area before leaving the harbor and keep crew in life jackets.

  • Check local tide tables

    SailCall does not include tide data yet — verify harbor depth before you go.

    At harbor: Wed, Aug 12, 4:00 PM (Atlantic Standard Time)

Day outlook

2-day · °C, kt, m, nm, mm

Today

Fair

28°C / 28°C

2.3 mm · 68% · 18 kt · BF 5

Sail with preparation: strong wind or gusts (remaining hours).

Tomorrow

Fair

28°C / 28°C

0.1 mm · 22 kt · BF 6

Sail with preparation: strong wind or gusts.

Forecast data from third-party providers.