MARINE REPORT / 72 HOURS

Grand Cayman Snorkel Report Today

Cayman Islands · Updated Sat 12:21 (EST) · Source: Snapshot

The skinny

Marginal Data updated Sat 12:21 (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 · 3.0/10

Sat 14:00 (EST)

Later today

Fair · 3.7/10

Sat 18:00 (EST)

Next three days

Good · 6.1/10

Tue 09:00 (EST)

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

Score: 3.7/10

Best time: Sat 18:00

Main risk: Waves

No useful morning window is showing yet.

Best afternoon signal: Sat 18:00 (Fair). Peak afternoon wind is about 4.9 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

30.2°C

Sky

Cloudy

98% cloud

Good model window in the next 72 hours

Next good model window: Tue 07:00–09:00 (4% of the next 72h meets the model threshold)

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

The next good model window starts at Tue 07:00 and lasts until 09:00.

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 · 34/100

Low drift risk now.

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

⚠️ Fair

Advanced forecast data

Viewing historical data

Wed 14:00 – Sat 14:00 (EST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.35 around Wed 16:00; 0 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 0.92m to 1.18m).

Wind is at or below 5.4m/s in 10/24 sampled hours (range 2.38 to 6.88m/s).

Tides range from 0.27m to 0.51m; 0 of 24 hours are in or near peak slack windows.

72-hour historical overview
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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
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
Wed 17:00 0.94 · high 3.98 · good 29.50 · good Poor
Wed 18:00 0.94 · high 3.80 · good 29.50 · good Poor
Wed 19:00 0.92 · high 3.66 · good 29.50 · good Poor
Wed 20:00 0.96 · high 2.38 · good 29.50 · good Poor
Wed 21:00 0.98 · high 3.51 · good 29.50 · good Poor
Wed 22:00 1.02 · high 5.45 · high 29.50 · good Poor
Wed 23:00 1.02 · high 4.40 · good 29.50 · good Poor
Thu 00:00 1.02 · high 5.42 · high 29.40 · good Poor
Thu 01:00 1.02 · high 6.39 · high 29.40 · good Poor
Thu 02:00 1.02 · high 5.94 · high 29.40 · good Poor
Thu 03:00 1.04 · high 5.95 · high 29.40 · good Poor
Thu 04:00 1.04 · high 6.20 · high 29.40 · good Poor
Thu 05:00 1.08 · high 6.10 · high 29.40 · good Poor
Thu 06:00 1.08 · high 6.35 · high 29.40 · good Poor
Thu 07:00 1.10 · high 5.70 · high 29.40 · good Poor
Thu 08:00 1.12 · high 5.91 · high 29.40 · good Poor
Thu 09:00 1.16 · high 6.88 · high 29.40 · good Poor
Thu 10:00 1.18 · high 5.56 · high 29.50 · good Poor
Thu 11:00 1.18 · high 3.58 · good 29.50 · good Poor
Thu 12:00 1.16 · high 6.74 · high 29.50 · good Poor
Thu 13:00 1.16 · high 5.91 · high 29.50 · good Poor
Thu 14:00 1.14 · high 4.60 · good 29.50 · good Poor
Thu 15:00 1.14 · high 4.36 · good 29.50 · good Poor
Thu 16:00 1.12 · high 3.93 · good 29.50 · good Poor
Thu 17:00 1.12 · high 2.36 · good 29.50 · good Fair
Thu 18:00 1.10 · high 3.66 · good 29.50 · good Poor
Thu 19:00 1.10 · high 3.79 · good 29.50 · good Poor
Thu 20:00 1.10 · high 4.95 · good 29.50 · good Poor
Thu 21:00 1.08 · high 4.48 · good 29.50 · good Poor
Thu 22:00 1.08 · high 3.45 · good 29.50 · good Poor
Thu 23:00 1.08 · high 3.77 · good 29.50 · good Poor
Fri 00:00 1.06 · high 4.75 · good 29.50 · good Poor
Fri 01:00 1.06 · high 4.68 · good 29.50 · good Poor
Fri 02:00 1.06 · high 4.35 · good 29.50 · good Poor
Fri 03:00 1.06 · high 4.99 · good 29.40 · good Poor
Fri 04:00 1.06 · high 6.04 · high 29.40 · good Poor
Fri 05:00 1.06 · high 5.08 · good 29.40 · good Poor
Fri 06:00 1.00 · high 4.63 · good 29.40 · good Poor
Fri 07:00 0.98 · high 3.96 · good 29.40 · good Fair
Fri 08:00 0.96 · high 4.38 · good 29.40 · good Fair
Fri 09:00 0.96 · high 4.05 · good 29.50 · good Poor
Fri 10:00 0.94 · high 4.18 · good 29.50 · good Poor
Fri 11:00 0.94 · high 4.44 · good 29.60 · good Poor
Fri 12:00 0.92 · high 4.10 · good 29.60 · good Poor
Fri 13:00 0.98 · high 4.65 · good 29.70 · good Poor
Fri 14:00 0.96 · high 4.29 · good 29.70 · good Poor
Fri 15:00 0.96 · high 4.16 · good 29.70 · good Poor
Fri 16:00 0.94 · high 4.59 · good 29.70 · good Poor
Fri 17:00 0.94 · high 5.15 · good 29.70 · good Poor
Fri 18:00 0.92 · high 5.21 · good 29.70 · good Poor
Fri 19:00 0.92 · high 4.51 · good 29.70 · good Poor
Fri 20:00 0.92 · high 4.46 · good 29.70 · good Poor
Fri 21:00 0.90 · high 4.04 · good 29.70 · good Poor
Fri 22:00 0.90 · high 3.94 · good 29.70 · good Poor
Fri 23:00 0.90 · high 2.69 · good 29.70 · good Poor
Sat 00:00 0.88 · high 2.78 · good 29.60 · good Poor
Sat 01:00 0.88 · high 3.88 · good 29.60 · good Poor
Sat 02:00 0.86 · high 3.73 · good 29.60 · good Poor
Sat 03:00 0.86 · high 3.73 · good 29.60 · good Poor
Sat 04:00 0.84 · high 4.31 · good 29.60 · good Poor
Sat 05:00 0.84 · high 4.74 · good 29.60 · good Poor
Sat 06:00 0.86 · high 5.12 · good 29.60 · good Poor
Sat 07:00 0.86 · high 4.70 · good 29.60 · good Poor
Sat 08:00 0.86 · high 5.18 · good 29.70 · good Poor
Sat 09:00 0.88 · high 5.20 · good 29.70 · good Poor
Sat 10:00 0.88 · high 5.20 · good 29.70 · good Poor
Sat 11:00 0.88 · high 5.61 · high 29.80 · good Poor
Sat 12:00 0.86 · high 4.50 · good 29.80 · good Poor
Sat 13:00 0.86 · high 4.47 · good 29.90 · good Poor