MARINE REPORT / 72 HOURS

Grand Cayman Snorkel Report Today

Cayman Islands · Updated Fri 23:09 (EST) · Source: Snapshot

The skinny

Marginal Data updated Fri 23:09 (EST)

Grand Cayman looks marginal today. The least-bad daylight window is around Sat 15:00, but waves is limiting the forecast.

Right now (forecast)

Poor · 0.0/10

Sat 00:00 (EST)

Later today

Fair · 4.3/10

Sat 15:00 (EST)

Next three days

Fair · 5.1/10

Mon 16:00 (EST)

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

Score: 4.3/10

Best time: Sat 15:00

Main risk: Waves

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

Best afternoon signal: Sat 15:00 (Fair). Peak afternoon wind is about 3.8 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

29.8°C

Max air

29.3°C

Sky

Cloudy

99% 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 16:00: Fair (0.51) · still limited by waves, tide/current
  • Mon 10:00: Fair (0.50) · still limited by waves, tide/current
  • Mon 09:00: Fair (0.50) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

  • Waves (70 hours)
  • Tide/current (70 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 00:00 – Fri 00:00 (EST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.45 around Tue 10:00; 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 0.8m to 1.1m).

Wind is at or below 5.4m/s in 23/24 sampled hours (range 3.25 to 5.59m/s).

Tides range from 0.42m to 0.61m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview
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
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
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
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 00:00 1.10 · high 5.59 · high 29.60 · good Poor
Tue 01:00 1.08 · high 5.22 · good 29.60 · good Poor
Tue 02:00 1.06 · high 4.40 · good 29.60 · good Poor
Tue 03:00 1.04 · high 4.72 · good 29.60 · good Poor
Tue 04:00 1.02 · high 4.87 · good 29.50 · good Poor
Tue 05:00 1.00 · high 3.83 · good 29.50 · good Poor
Tue 06:00 0.90 · high 3.39 · good 29.50 · good Poor
Tue 07:00 0.88 · high 3.25 · good 29.50 · good Fair
Tue 08:00 0.86 · high 3.59 · good 29.50 · good Fair
Tue 09:00 0.84 · high 3.66 · good 29.50 · good Fair
Tue 10:00 0.82 · high 3.26 · good 29.60 · good Fair
Tue 11:00 0.80 · high 4.98 · good 29.60 · good Fair
Tue 12:00 0.88 · high 4.79 · good 29.70 · good Fair
Tue 13:00 0.88 · high 4.47 · good 29.70 · good Fair
Tue 14:00 0.88 · high 4.16 · good 29.70 · good Fair
Tue 15:00 0.86 · high 3.95 · good 29.70 · good Fair
Tue 16:00 0.86 · high 3.81 · good 29.80 · good Fair
Tue 17:00 0.84 · high 3.64 · good 29.70 · good Fair
Tue 18:00 0.84 · high 3.74 · good 29.70 · good Fair
Tue 19:00 0.82 · high 4.04 · good 29.70 · good Poor
Tue 20:00 0.82 · high 4.56 · good 29.70 · good Poor
Tue 21:00 0.80 · high 4.54 · good 29.70 · good Poor
Tue 22:00 0.80 · high 4.74 · good 29.70 · good Poor
Tue 23:00 0.80 · high 4.14 · good 29.60 · good Poor
Wed 00:00 0.80 · high 4.52 · good 29.60 · good Poor
Wed 01:00 0.80 · high 4.94 · good 29.60 · good Poor
Wed 02:00 0.80 · high 4.46 · good 29.60 · good Poor
Wed 03:00 0.82 · high 4.07 · good 29.50 · good Poor
Wed 04:00 0.82 · high 3.95 · good 29.50 · good Poor
Wed 05:00 0.84 · high 4.55 · good 29.50 · good Poor
Wed 06:00 0.88 · high 4.60 · good 29.50 · good Poor
Wed 07:00 0.94 · high 5.58 · high 29.50 · good Fair
Wed 08:00 0.96 · high 4.75 · good 29.50 · good Fair
Wed 09:00 0.96 · high 4.65 · good 29.60 · good Fair
Wed 10:00 0.98 · high 4.71 · good 29.60 · good Fair
Wed 11:00 0.98 · high 5.06 · good 29.70 · good Fair
Wed 12:00 1.00 · high 5.01 · good 29.70 · good Fair
Wed 13:00 1.00 · high 4.70 · good 29.70 · good Fair
Wed 14:00 1.02 · high 4.21 · good 29.70 · good Fair
Wed 15:00 1.04 · high 4.78 · good 29.80 · good Fair
Wed 16:00 1.06 · high 4.83 · good 29.80 · good Fair
Wed 17:00 1.10 · high 4.90 · good 29.80 · good Fair
Wed 18:00 1.12 · high 5.21 · good 29.80 · good Poor
Wed 19:00 0.94 · high 5.22 · good 29.80 · good Poor
Wed 20:00 1.00 · high 5.56 · high 29.80 · good Poor
Wed 21:00 1.08 · high 5.76 · high 29.70 · good Poor
Wed 22:00 1.14 · high 5.51 · high 29.70 · good Poor
Wed 23:00 1.18 · high 5.69 · high 29.70 · good Poor
Thu 00:00 1.20 · high 5.30 · good 29.70 · good Poor
Thu 01:00 1.24 · high 6.09 · high 29.60 · good Poor
Thu 02:00 1.26 · high 6.18 · high 29.60 · good Poor
Thu 03:00 1.28 · high 7.14 · high 29.60 · good Poor
Thu 04:00 1.30 · high 6.57 · high 29.50 · good Poor
Thu 05:00 1.30 · high 6.31 · high 29.50 · good Poor
Thu 06:00 1.30 · high 5.60 · high 29.50 · good Poor
Thu 07:00 1.34 · high 5.46 · high 29.50 · good Poor
Thu 08:00 1.34 · high 4.83 · good 29.50 · good Poor
Thu 09:00 1.36 · high 4.82 · good 29.50 · good Poor
Thu 10:00 1.36 · high 4.47 · good 29.60 · good Fair
Thu 11:00 1.30 · high 5.40 · good 29.60 · good Fair
Thu 12:00 1.30 · high 6.13 · high 29.60 · good Poor
Thu 13:00 1.30 · high 6.12 · high 29.60 · good Poor
Thu 14:00 1.30 · high 6.02 · high 29.60 · good Fair
Thu 15:00 1.30 · high 6.85 · high 29.60 · good Poor
Thu 16:00 1.30 · high 5.47 · high 29.60 · good Fair
Thu 17:00 1.28 · high 4.83 · good 29.60 · good Fair
Thu 18:00 1.28 · high 4.92 · good 29.60 · good Fair
Thu 19:00 1.26 · high 6.08 · high 29.60 · good Poor
Thu 20:00 1.24 · high 5.36 · good 29.60 · good Poor
Thu 21:00 1.24 · high 6.04 · high 29.60 · good Poor
Thu 22:00 1.22 · high 5.26 · good 29.60 · good Poor
Thu 23:00 1.20 · high 5.11 · good 29.50 · good Poor