MARINE REPORT / 72 HOURS

Grand Cayman Snorkel Report Today

Cayman Islands · Updated Sat 05:44 (EST) · Source: Snapshot

The skinny

Marginal Data updated Sat 05:44 (EST)

Grand Cayman looks marginal today. The least-bad daylight window is around Sat 13:00, but waves is limiting the forecast.

Right now (forecast)

Poor · 0.0/10

Sat 06:00 (EST)

Later today

Fair · 3.8/10

Sat 13:00 (EST)

Next three days

Fair · 5.1/10

Mon 07:00 (EST)

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

Score: 3.8/10

Best time: Sat 13:00

Main risk: Waves

Best morning signal: Sat 07:00 (Fair).

Best afternoon signal: Sat 13:00 (Fair). Peak afternoon wind is about 4.8 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

29.7°C

Max air

30.1°C

Sky

Cloudy

95% cloud

No good model window in the next 72 hours

Use the best-available section for the least-bad times.

3-day planner Best available Show data

3-day planner

Saturday

⚠️ Fair conditions

Main blocker: Waves

Sunday

⚠️ Fair conditions

Main blocker: Waves

Monday

⚠️ Fair conditions

Main blocker: Waves

Best available hours

  • Mon 07:00: Fair (0.51) · still limited by waves, tide/current
  • Mon 17:00: Fair (0.51) · still limited by waves, tide/current
  • Mon 08:00: Fair (0.47) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

  • Waves (70 hours)
  • Tide/current (68 hours)
  • Darkness (36 hours)

Jellyfish drift risk

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

Low · 34/100

Low peak drift risk around Sat 13:00.

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: Mon 04:00

Mon 04:00

Nearby alternatives in Cayman Islands

Little Cayman

129 km away

❌ Poor

Advanced forecast data

Viewing historical data

Tue 06:00 – Fri 06:00 (EST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.61 around Tue 07:00; 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.

0/24 sampled hours stay at or below 0.36m (range 0.52m to 0.62m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 1.1 to 5.05m/s).

Tides range from 0.43m to 0.71m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview
Poor ❌ Limited
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Good 🌟 Good
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
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Good 🌟 Good
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
Tue 06:00 0.58 · high 1.35 · good 29.90 · good Poor
Tue 07:00 0.58 · high 2.58 · good 29.90 · good Good
Tue 08:00 0.58 · high 3.26 · good 29.90 · good Fair
Tue 09:00 0.56 · high 5.05 · good 30.00 · good Fair
Tue 10:00 0.56 · high 3.02 · good 30.00 · good Good
Tue 11:00 0.56 · high 3.26 · good 30.10 · good Good
Tue 12:00 0.60 · high 3.25 · good 30.10 · good Good
Tue 13:00 0.62 · high 4.06 · good 30.20 · good Fair
Tue 14:00 0.60 · high 3.57 · good 30.20 · good Fair
Tue 15:00 0.60 · high 2.79 · good 30.20 · good Fair
Tue 16:00 0.58 · high 3.29 · good 30.20 · good Fair
Tue 17:00 0.58 · high 3.51 · good 30.20 · good Fair
Tue 18:00 0.56 · high 2.33 · good 30.20 · good Good
Tue 19:00 0.56 · high 1.10 · good 30.20 · good Poor
Tue 20:00 0.54 · high 1.93 · good 30.20 · good Poor
Tue 21:00 0.54 · high 2.40 · good 30.10 · good Poor
Tue 22:00 0.52 · high 2.56 · good 30.10 · good Poor
Tue 23:00 0.52 · high 2.80 · good 30.10 · good Poor
Wed 00:00 0.52 · high 1.89 · good 30.00 · good Poor
Wed 01:00 0.52 · high 1.91 · good 30.00 · good Poor
Wed 02:00 0.52 · high 1.94 · good 30.00 · good Poor
Wed 03:00 0.52 · high 1.56 · good 30.00 · good Poor
Wed 04:00 0.52 · high 2.09 · good 30.00 · good Poor
Wed 05:00 0.52 · high 2.38 · good 29.90 · good Poor
Wed 06:00 0.52 · high 2.17 · good 30.00 · good Poor
Wed 07:00 0.52 · high 1.84 · good 30.00 · good Good
Wed 08:00 0.52 · high 1.58 · good 30.00 · good Good
Wed 09:00 0.50 · high 2.09 · good 30.10 · good Good
Wed 10:00 0.50 · high 2.56 · good 30.20 · good Good
Wed 11:00 0.50 · high 2.24 · good 30.30 · good Good
Wed 12:00 0.48 · high 2.43 · good 30.40 · good Good
Wed 13:00 0.48 · high 2.96 · good 30.40 · good Good
Wed 14:00 0.48 · high 2.98 · good 30.40 · good Good
Wed 15:00 0.48 · high 2.80 · good 30.40 · good Good
Wed 16:00 0.48 · high 2.93 · good 30.40 · good Good
Wed 17:00 0.48 · high 2.42 · good 30.40 · good Good
Wed 18:00 0.50 · high 1.48 · good 30.40 · good Good
Wed 19:00 0.50 · high 1.00 · good 30.30 · good Poor
Wed 20:00 0.50 · high 1.85 · good 30.30 · good Poor
Wed 21:00 0.52 · high 1.46 · good 30.30 · good Poor
Wed 22:00 0.52 · high 1.56 · good 30.30 · good Poor
Wed 23:00 0.52 · high 1.43 · good 30.20 · good Poor
Thu 00:00 0.50 · high 2.20 · good 30.20 · good Poor
Thu 01:00 0.50 · high 2.18 · good 30.20 · good Poor
Thu 02:00 0.50 · high 1.97 · good 30.20 · good Poor
Thu 03:00 0.48 · high 2.33 · good 30.10 · good Poor
Thu 04:00 0.48 · high 2.68 · good 30.10 · good Poor
Thu 05:00 0.48 · high 3.02 · good 30.10 · good Poor
Thu 06:00 0.42 · high 3.48 · good 30.10 · good Poor
Thu 07:00 0.42 · high 3.12 · good 30.10 · good Good
Thu 08:00 0.44 · high 3.30 · good 30.10 · good Good
Thu 09:00 0.46 · high 3.26 · good 30.20 · good Good
Thu 10:00 0.46 · high 3.59 · good 30.30 · good Good
Thu 11:00 0.46 · high 2.59 · good 30.40 · good Good
Thu 12:00 0.46 · high 2.81 · good 30.40 · good Good
Thu 13:00 0.46 · high 3.58 · good 30.50 · out of range Good
Thu 14:00 0.44 · high 3.85 · good 30.50 · out of range Good
Thu 15:00 0.44 · high 3.92 · good 30.50 · out of range Good
Thu 16:00 0.42 · high 4.20 · good 30.50 · out of range Fair
Thu 17:00 0.42 · high 4.27 · good 30.50 · out of range Fair
Thu 18:00 0.42 · high 3.75 · good 30.50 · out of range Good
Thu 19:00 0.42 · high 3.44 · good 30.50 · out of range Poor
Thu 20:00 0.42 · high 3.76 · good 30.40 · good Poor
Thu 21:00 0.42 · high 3.89 · good 30.40 · good Poor
Thu 22:00 0.42 · high 4.31 · good 30.40 · good Poor
Thu 23:00 0.42 · high 4.56 · good 30.30 · good Poor
Fri 00:00 0.44 · high 4.14 · good 30.30 · good Poor
Fri 01:00 0.44 · high 2.83 · good 30.20 · good Poor
Fri 02:00 0.44 · high 2.80 · good 30.20 · good Poor
Fri 03:00 0.46 · high 2.60 · good 30.20 · good Poor
Fri 04:00 0.46 · high 2.29 · good 30.20 · good Poor
Fri 05:00 0.46 · high 5.88 · high 30.10 · good Poor