MARINE REPORT / 72 HOURS

Grand Cayman Snorkel Report Today

Cayman Islands · Updated Sat 02:15 (EST) · Source: Snapshot

The skinny

Marginal Data updated Sat 02:15 (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 04:00 (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

29.7°C

Max air

29.3°C

Sky

Cloudy

91% 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 (69 hours)
  • Tide/current (69 hours)
  • Darkness (35 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

Thu 04:00 – Sun 04:00 (EST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.67 around Thu 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 0.42m to 0.48m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 2.59 to 4.56m/s).

Tides range from 0.4m to 0.71m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview
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
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
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
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
Fri 06:00 0.50 · high 4.61 · good 30.10 · good Poor
Fri 07:00 0.52 · high 6.05 · high 30.10 · good Fair
Fri 08:00 0.54 · high 4.99 · good 30.10 · good Fair
Fri 09:00 0.54 · high 5.27 · good 30.10 · good Fair
Fri 10:00 0.56 · high 5.32 · good 30.20 · good Fair
Fri 11:00 0.56 · high 5.39 · good 30.20 · good Fair
Fri 12:00 0.58 · high 5.36 · good 30.20 · good Fair
Fri 13:00 0.58 · high 4.93 · good 30.30 · good Fair
Fri 14:00 0.58 · high 4.77 · good 30.30 · good Fair
Fri 15:00 0.58 · high 4.64 · good 30.30 · good Fair
Fri 16:00 0.58 · high 4.70 · good 30.30 · good Fair
Fri 17:00 0.62 · high 4.84 · good 30.30 · good Fair
Fri 18:00 0.66 · high 5.29 · good 30.30 · good Poor
Fri 19:00 0.70 · high 5.59 · high 30.30 · good Poor
Fri 20:00 0.76 · high 5.54 · high 30.30 · good Poor
Fri 21:00 0.80 · high 5.27 · good 30.20 · good Poor
Fri 22:00 0.86 · high 5.53 · high 30.20 · good Poor
Fri 23:00 0.90 · high 5.00 · good 30.10 · good Poor
Sat 00:00 0.94 · high 5.38 · good 30.10 · good Poor
Sat 01:00 0.98 · high 5.66 · high 30.10 · good Poor
Sat 02:00 1.00 · high 5.80 · high 30.00 · good Poor
Sat 03:00 1.02 · high 6.12 · high 30.00 · good Poor
Sat 04:00 1.04 · high 6.82 · high 30.00 · good Poor
Sat 05:00 1.04 · high 6.34 · high 29.90 · good Poor
Sat 06:00 1.04 · high 5.95 · high 29.90 · good Poor
Sat 07:00 1.04 · high 6.33 · high 29.90 · good Poor
Sat 08:00 1.04 · high 6.24 · high 29.90 · good Poor
Sat 09:00 1.06 · high 6.12 · high 29.90 · good Poor
Sat 10:00 1.06 · high 6.37 · high 29.90 · good Poor
Sat 11:00 1.06 · high 5.72 · high 29.90 · good Poor
Sat 12:00 1.08 · high 5.72 · high 29.90 · good Poor
Sat 13:00 1.10 · high 5.77 · high 29.90 · good Poor
Sat 14:00 1.10 · high 5.74 · high 29.90 · good Poor
Sat 15:00 1.10 · high 5.56 · high 29.90 · good Poor
Sat 16:00 1.10 · high 4.96 · good 29.90 · good Poor
Sat 17:00 1.08 · high 4.57 · good 29.90 · good Poor
Sat 18:00 1.04 · high 4.03 · good 29.90 · good Poor
Sat 19:00 1.02 · high 3.86 · good 29.90 · good Poor
Sat 20:00 1.00 · high 3.80 · good 29.90 · good Poor
Sat 21:00 1.00 · high 4.61 · good 29.80 · good Poor
Sat 22:00 0.98 · high 4.71 · good 29.80 · good Poor
Sat 23:00 0.98 · high 3.46 · good 29.80 · good Poor
Sun 00:00 0.98 · high 4.48 · good 29.80 · good Poor
Sun 01:00 0.98 · high 4.83 · good 29.80 · good Poor
Sun 02:00 0.98 · high 4.92 · good 29.80 · good Poor
Sun 03:00 0.96 · high 4.88 · good 29.70 · good Poor