SnorkelForecast.com

Grand Cayman Snorkel Report Today

Cayman Islands · Updated Tue 20:31 (EST) · Source: Snapshot

The skinny

Go in the best window Report Tue 18:25

Grand Cayman has a usable snorkeling window around Thu 15:00. The main thing to watch is waves.

Score: 5.5/10

Best time: Thu 15:00

Main risk: Waves

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

06:10

Sunset

18:39

Water

31.0°C

Max air

26.8°C

Sky

Cloudy

71% cloud

Good window is available today

Next good model window: Thu 20:00–22:00 (4% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Tuesday

❌ Poor conditions

Main blocker: Waves

Wednesday

⚠️ Fair conditions

Main blocker: Waves

Thursday

✅ Good conditions

Main blocker: Waves

Best available hours

The next good model window starts at Thu 20:00 and lasts until 22:00.

Why this verdict

Main blockers across the next 72 hours:

  • Waves (68 hours)
  • Sea temperature (68 hours)
  • Tide/current (68 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: Thu 06:00

Wed 19:00, Thu 06:00, Thu 21:00

Nearby alternatives in Cayman Islands

Little Cayman

129 km away

✅ Good

Advanced forecast data

Viewing current forecast

Tue 23:00 – Fri 23:00 (EST)

Previous day Yesterday

Snorkel Score (next 24h)

Best snorkel score is 0.55 around Wed 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.

0/24 sampled hours stay at or below 0.36m (range 0.52m to 0.58m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 1.3 to 4.17m/s).

Tides range from 0.22m to 0.45m; 1 of 24 hours are in or near peak slack windows.

72-hour forecast overview
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
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
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
Wed 00:00 0.58 · high 4.17 · good 31.00 · out of range Poor
Wed 01:00 0.58 · high 1.80 · good 30.90 · out of range Poor
Wed 02:00 0.56 · high 1.64 · good 30.90 · out of range Poor
Wed 03:00 0.56 · high 2.24 · good 30.90 · out of range Poor
Wed 04:00 0.54 · high 2.74 · good 30.80 · out of range Poor
Wed 05:00 0.54 · high 2.97 · good 30.80 · out of range Poor
Wed 06:00 0.52 · high 2.70 · good 30.70 · out of range Poor
Wed 07:00 0.52 · high 2.41 · good 30.70 · out of range Poor
Wed 08:00 0.52 · high 2.44 · good 30.70 · out of range Poor
Wed 09:00 0.52 · high 2.82 · good 30.60 · out of range Poor
Wed 10:00 0.52 · high 2.52 · good 30.60 · out of range Poor
Wed 11:00 0.52 · high 2.80 · good 30.60 · out of range Poor
Wed 12:00 0.52 · high 2.75 · good 30.70 · out of range Fair
Wed 13:00 0.52 · high 2.55 · good 30.70 · out of range Fair
Wed 14:00 0.54 · high 2.39 · good 30.80 · out of range Fair
Wed 15:00 0.54 · high 2.42 · good 31.00 · out of range Fair
Wed 16:00 0.54 · high 2.58 · good 31.10 · out of range Fair
Wed 17:00 0.56 · high 1.99 · good 31.20 · out of range Fair
Wed 18:00 0.56 · high 2.27 · good 31.30 · out of range Fair
Wed 19:00 0.56 · high 2.63 · good 31.30 · out of range Fair
Wed 20:00 0.56 · high 1.90 · good 31.30 · out of range Fair
Wed 21:00 0.56 · high 2.37 · good 31.40 · out of range Fair
Wed 22:00 0.56 · high 2.20 · good 31.40 · out of range Fair
Wed 23:00 0.58 · high 1.30 · good 31.30 · out of range Fair
Thu 00:00 0.58 · high 0.89 · good 31.30 · out of range Poor
Thu 01:00 0.58 · high 1.46 · good 31.30 · out of range Poor
Thu 02:00 0.58 · high 0.87 · good 31.30 · out of range Poor
Thu 03:00 0.58 · high 6.95 · high 31.20 · out of range Poor
Thu 04:00 0.58 · high 0.68 · good 31.20 · out of range Poor
Thu 05:00 0.60 · high 1.92 · good 31.10 · out of range Poor
Thu 06:00 0.60 · high 2.03 · good 31.10 · out of range Poor
Thu 07:00 0.60 · high 2.04 · good 31.00 · out of range Poor
Thu 08:00 0.62 · high 3.02 · good 31.00 · out of range Poor
Thu 09:00 0.62 · high 2.39 · good 31.00 · out of range Poor
Thu 10:00 0.60 · high 2.37 · good 31.00 · out of range Poor
Thu 11:00 0.60 · high 3.18 · good 31.00 · out of range Poor
Thu 12:00 0.58 · high 2.90 · good 31.00 · out of range Fair
Thu 13:00 0.58 · high 3.16 · good 31.00 · out of range Fair
Thu 14:00 0.58 · high 3.11 · good 31.10 · out of range Fair
Thu 15:00 0.58 · high 3.20 · good 31.10 · out of range Fair
Thu 16:00 0.58 · high 3.09 · good 31.20 · out of range Fair
Thu 17:00 0.58 · high 2.97 · good 31.30 · out of range Fair
Thu 18:00 0.58 · high 2.76 · good 31.30 · out of range Fair
Thu 19:00 0.58 · high 2.62 · good 31.40 · out of range Fair
Thu 20:00 0.58 · high 1.87 · good 31.40 · out of range Good
Thu 21:00 0.58 · high 1.55 · good 31.40 · out of range Good
Thu 22:00 0.58 · high 1.27 · good 31.40 · out of range Good
Thu 23:00 0.58 · high 0.91 · good 31.40 · out of range Fair
Fri 00:00 0.58 · high 5.11 · good 31.40 · out of range Poor
Fri 01:00 0.58 · high 4.66 · good 31.40 · out of range Poor
Fri 02:00 0.58 · high 4.38 · good 31.40 · out of range Poor
Fri 03:00 0.58 · high 3.97 · good 31.30 · out of range Poor
Fri 04:00 0.58 · high 3.16 · good 31.30 · out of range Poor
Fri 05:00 0.60 · high 3.46 · good 31.20 · out of range Poor
Fri 06:00 0.60 · high 3.42 · good 31.20 · out of range Poor
Fri 07:00 0.60 · high 4.13 · good 31.10 · out of range Poor
Fri 08:00 0.62 · high 3.96 · good 31.10 · out of range Poor
Fri 09:00 0.62 · high 4.41 · good 31.10 · out of range Poor
Fri 10:00 0.62 · high 4.24 · good 31.00 · out of range Poor
Fri 11:00 0.64 · high 4.32 · good 31.00 · out of range Poor
Fri 12:00 0.64 · high 4.50 · good 31.00 · out of range Fair
Fri 13:00 0.66 · high 4.08 · good 31.10 · out of range Fair
Fri 14:00 0.68 · high 4.46 · good 31.10 · out of range Poor
Fri 15:00 0.70 · high 4.55 · good 31.20 · out of range Poor
Fri 16:00 0.70 · high 4.47 · good 31.20 · out of range Poor
Fri 17:00 0.72 · high 4.37 · good 31.30 · out of range Poor
Fri 18:00 0.72 · high 4.11 · good 31.30 · out of range Poor
Fri 19:00 0.72 · high 3.79 · good 31.40 · out of range Poor