MARINE REPORT / 72 HOURS

Grand Cayman Snorkel Report Today

Cayman Islands · Updated Sat 15:27 (EST) · Source: Snapshot

The skinny

Marginal Data updated Sat 15:27 (EST)

Grand Cayman looks marginal today. The least-bad daylight window is around Sat 18:00, but waves is limiting the forecast.

Right now (forecast)

Poor · 3.2/10

Sat 17:00 (EST)

Later today

Poor · 3.3/10

Sat 18:00 (EST)

Next three days

Good · 6.3/10

Tue 09:00 (EST)

Model estimates using Open-Meteo; not observations or safety guarantees. Check official advisories and conditions at the beach.

Score: 3.3/10

Best time: Sat 18:00

Main risk: Waves

No useful morning window is showing yet.

Best afternoon signal: Sat 18:00 (Poor). Peak afternoon wind is about 3.9 m/s.

Email me when it is good

Also see the best places to snorkel in the Caribbean, ranked on our stored historical scores.

Sunrise

06:20

Sunset

18:00

Water

29.9°C

Max air

28.9°C

Sky

Cloudy

98% cloud

Good model window in the next 72 hours

Next good model window: Tue 08:00–10:00 (9% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Saturday

❌ Poor conditions

Main blocker: Waves

Sunday

⚠️ Fair conditions

Main blocker: Waves

Monday

⚠️ Fair conditions

Main blocker: Waves

Best available hours

The next good model window starts at Tue 08:00 and lasts until 10:00.

Why this verdict

Main blockers across the next 72 hours:

  • Waves (69 hours)
  • Tide/current (69 hours)
  • Darkness (38 hours)

Jellyfish drift risk

Drift estimate from wind, swell, current and warm water.

Low · 32/100

Low peak drift risk around Sun 11:00.

warm water supports seasonal jellyfish activity; surface drift/current is noticeable; local shoreline exposure is not mapped yet.

Sightings override the model: if you see small purple jellyfish with long trailing tentacles, treat them as sting-capable and give them space.

Upcoming high tides

Next early morning high tide: Sun 03:00

Sun 03:00, Mon 04:00, Tue 05:00

Nearby alternatives in Cayman Islands

Little Cayman

129 km away

❌ Poor

Advanced forecast data

Viewing historical data

Sun 17:00 – Wed 17:00 (EST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.63 around Mon 08:00; 12 of 24 hours are good, fair, or excellent.

Score trend, higher is better. Excellent ≥ 0.72, good 0.55–0.72, fair 0.35–0.55.

Conditions (24h trends)

Tap a chart to load just that series.

4/24 sampled hours stay at or below 0.36m (range 0.36m to 0.62m).

Wind is at or below 5.4m/s in 22/24 sampled hours (range 0.58 to 6.14m/s).

Tides range from 0.23m to 0.52m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Scoring methodology (for technical users)

We score each hour from 0 to 1 using daylight and these weighted components:

  • Wave height (35%): best below 0.36m, then decreases as it rises.
  • Wind speed (25%): best below 5.4m/s, lower is better.
  • Sea surface temperature (15%): best within 20.6°C to 30.4°C.
  • Tide and currents (15%): best around slack/high-tide windows.
  • Daylight (10%): visibility is better in daylight, so night hours score lower.
Detailed hourly data table
Time Wave (m) Wind (m/s) Sea temp (°C) Status
Sun 17:00 0.42 · high 0.87 · good 30.10 · good Fair
Sun 18:00 0.42 · high 1.59 · good 30.00 · good Fair
Sun 19:00 0.42 · high 0.87 · good 30.00 · good Poor
Sun 20:00 0.42 · high 0.58 · good 29.90 · good Poor
Sun 21:00 0.40 · high 0.80 · good 29.90 · good Poor
Sun 22:00 0.40 · high 1.96 · good 29.90 · good Poor
Sun 23:00 0.40 · high 2.12 · good 29.80 · good Poor
Mon 00:00 0.40 · high 2.69 · good 29.80 · good Poor
Mon 01:00 0.40 · high 2.37 · good 29.80 · good Poor
Mon 02:00 0.40 · high 1.85 · good 29.70 · good Poor
Mon 03:00 0.38 · high 1.73 · good 29.70 · good Poor
Mon 04:00 0.38 · high 1.39 · good 29.70 · good Poor
Mon 05:00 0.38 · high 1.14 · good 29.60 · good Poor
Mon 06:00 0.36 · good 1.03 · good 29.70 · good Poor
Mon 07:00 0.36 · good 1.45 · good 29.70 · good Good
Mon 08:00 0.36 · good 1.33 · good 29.70 · good Good
Mon 09:00 0.36 · good 2.00 · good 29.70 · good Good
Mon 10:00 0.38 · high 3.55 · good 29.80 · good Fair
Mon 11:00 0.40 · high 4.35 · good 29.80 · good Fair
Mon 12:00 0.42 · high 0.94 · good 29.80 · good Fair
Mon 13:00 0.44 · high 3.25 · good 29.90 · good Fair
Mon 14:00 0.50 · high 5.83 · high 29.90 · good Fair
Mon 15:00 0.56 · high 6.14 · high 29.90 · good Fair
Mon 16:00 0.62 · high 2.52 · good 29.90 · good Fair
Mon 17:00 0.60 · high 2.25 · good 29.90 · good Fair
Mon 18:00 0.58 · high 1.70 · good 29.90 · good Fair
Mon 19:00 0.56 · high 4.63 · good 29.90 · good Poor
Mon 20:00 0.54 · high 4.59 · good 29.90 · good Poor
Mon 21:00 0.54 · high 2.65 · good 29.80 · good Poor
Mon 22:00 0.52 · high 3.08 · good 29.80 · good Poor
Mon 23:00 0.52 · high 3.59 · good 29.70 · good Poor
Tue 00:00 0.52 · high 3.73 · good 29.70 · good Poor
Tue 01:00 0.52 · high 3.88 · good 29.70 · good Poor
Tue 02:00 0.54 · high 4.18 · good 29.60 · good Poor
Tue 03:00 0.58 · high 4.36 · good 29.60 · good Poor
Tue 04:00 0.60 · high 3.58 · good 29.60 · good Poor
Tue 05:00 0.60 · high 3.75 · good 29.60 · good Poor
Tue 06:00 0.60 · high 3.11 · good 29.50 · good Poor
Tue 07:00 0.58 · high 4.69 · good 29.40 · good Fair
Tue 08:00 0.58 · high 4.79 · good 29.40 · good Fair
Tue 09:00 0.58 · high 4.49 · good 29.50 · good Fair
Tue 10:00 0.58 · high 4.41 · good 29.50 · good Fair
Tue 11:00 0.58 · high 4.00 · good 29.50 · good Fair
Tue 12:00 0.58 · high 5.63 · high 29.60 · good Fair
Tue 13:00 0.58 · high 2.74 · good 29.60 · good Fair
Tue 14:00 0.58 · high 3.18 · good 29.60 · good Fair
Tue 15:00 0.56 · high 3.22 · good 29.60 · good Fair
Tue 16:00 0.56 · high 4.06 · good 29.60 · good Fair
Tue 17:00 0.56 · high 5.21 · good 29.60 · good Fair
Tue 18:00 0.58 · high 5.96 · high 29.60 · good Fair
Tue 19:00 0.58 · high 6.49 · high 29.60 · good Poor
Tue 20:00 0.64 · high 5.18 · good 29.60 · good Poor
Tue 21:00 0.68 · high 5.53 · high 29.50 · good Poor
Tue 22:00 0.74 · high 4.57 · good 29.50 · good Poor
Tue 23:00 0.76 · high 5.10 · good 29.50 · good Poor
Wed 00:00 0.80 · high 4.98 · good 29.40 · good Poor
Wed 01:00 0.82 · high 4.54 · good 29.40 · good Poor
Wed 02:00 0.82 · high 4.16 · good 29.40 · good Poor
Wed 03:00 0.84 · high 4.72 · good 29.40 · good Poor
Wed 04:00 0.84 · high 5.30 · good 29.40 · good Poor
Wed 05:00 0.84 · high 5.87 · high 29.30 · good Poor
Wed 06:00 0.86 · high 5.24 · good 29.50 · good Poor
Wed 07:00 0.86 · high 5.68 · high 29.50 · good Poor
Wed 08:00 0.86 · high 6.10 · high 29.50 · good Poor
Wed 09:00 0.84 · high 6.75 · high 29.50 · good Poor
Wed 10:00 0.90 · high 6.43 · high 29.50 · good Poor
Wed 11:00 0.92 · high 6.49 · high 29.50 · good Poor
Wed 12:00 0.96 · high 5.80 · high 29.50 · good Poor
Wed 13:00 0.98 · high 5.10 · good 29.50 · good Poor
Wed 14:00 0.98 · high 4.87 · good 29.50 · good Poor
Wed 15:00 0.96 · high 5.06 · good 29.50 · good Poor
Wed 16:00 0.96 · high 3.87 · good 29.50 · good Poor