Can you snorkel in Grand Cayman today?

Conditions look marginal right now — no clearly safe snorkeling window is forecast in Grand Cayman over the next 72 hours. Check the hourly table for the calmest period.

What is the best time of day to snorkel in Grand Cayman?

Snorkel during daylight, ideally in the morning before the wind picks up, and around high slack tide when water is clearest and currents are weakest. SnorkelForecast scores every daylight hour in Grand Cayman so you can pick the calmest window.

What is the best tide for snorkeling?

High slack tide — within about an hour of the high-tide peak when currents are weakest — is the safest, clearest window. Strong low tides, strong tidal flow near channels or headlands, and large tidal-range days reduce score.

Grand Cayman Snorkel Report Today

Cayman Islands · Updated Tue 04:14 (EST) · Source: Snapshot

The skinny

Marginal Report Tue 16:21

Grand Cayman looks marginal today. The least-bad daylight window is around Tue 18:00, but waves is limiting the forecast.

Score: 5.3/10

Best time: Tue 18:00

Main risk: Waves

No useful morning window is showing yet.

Best afternoon signal: Tue 18:00 (Fair). Peak afternoon wind is about 3.7 m/s.

Email me when it is good

Sunrise

05:57

Sunset

19:05

Water

30.2°C

Max air

30.3°C

Sky

Clear

19% cloud

No safe 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

Tuesday

⚠️ fair conditions

Main blocker: Waves

Wednesday

⚠️ fair conditions

Main blocker: Waves

Thursday

⚠️ fair conditions

Main blocker: Waves

Best available hours

Tue 23:00 — Fair (0.53) · still limited by waves, tide/current
Wed 11:00 — Fair (0.51) · still limited by waves, tide/current
Tue 22:00 — Fair (0.51) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

Waves (54 hours)
Tide/current (38 hours)
Darkness (26 hours)

Jellyfish drift risk

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

Low · 32/100

Low peak drift risk around Wed 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: Wed 09:00

Tue 22:00, Wed 09:00

Nearby alternatives in Cayman Islands

Little Cayman

129 km away

⚠️ Fair

Advanced forecast data

Viewing historical data

Sun 21:00 – Wed 21:00 (EST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.44 around Mon 06:00; 9 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 1.36m to 1.58m).

Wind is at or below 5.4m/s in 8/24 sampled hours (range 3.86 to 6.86m/s).

Tides range from 0.4m to 0.76m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview

Sun 21:00 fair ⚠️ Fair

Sun 22:00 fair ⚠️ Fair

Sun 23:00 fair ⚠️ Fair

Mon 00:00 poor ❌ Limited

Mon 01:00 poor ❌ Limited

Mon 02:00 poor ❌ Limited

Mon 03:00 poor ❌ Limited

Mon 04:00 poor ❌ Limited

Mon 05:00 poor ❌ Limited

Mon 06:00 poor ❌ Limited

Mon 07:00 poor ❌ Limited

Mon 08:00 poor ❌ Limited

Mon 09:00 poor ❌ Limited

Mon 10:00 poor ❌ Limited

Mon 11:00 fair ⚠️ Fair

Mon 12:00 fair ⚠️ Fair

Mon 13:00 fair ⚠️ Fair

Mon 14:00 fair ⚠️ Fair

Mon 15:00 poor ❌ Limited

Mon 16:00 poor ❌ Limited

Mon 17:00 poor ❌ Limited

Mon 18:00 poor ❌ Limited

Mon 19:00 fair ⚠️ Fair

Mon 20:00 fair ⚠️ Fair

Mon 21:00 fair ⚠️ Fair

Mon 22:00 fair ⚠️ Fair

Mon 23:00 fair ⚠️ Fair

Tue 00:00 poor ❌ Limited

Tue 01:00 poor ❌ Limited

Tue 02:00 poor ❌ Limited

Tue 03:00 poor ❌ Limited

Tue 04:00 poor ❌ Limited

Tue 05:00 poor ❌ Limited

Tue 06:00 poor ❌ Limited

Tue 07:00 poor ❌ Limited

Tue 08:00 poor ❌ Limited

Tue 09:00 poor ❌ Limited

Tue 10:00 poor ❌ Limited

Tue 11:00 fair ⚠️ Fair

Tue 12:00 fair ⚠️ Fair

Tue 13:00 fair ⚠️ Fair

Tue 14:00 poor ❌ Limited

Tue 15:00 poor ❌ Limited

Tue 16:00 poor ❌ Limited

Tue 17:00 poor ❌ Limited

Tue 18:00 poor ❌ Limited

Tue 19:00 poor ❌ Limited

Tue 20:00 fair ⚠️ Fair

Tue 21:00 poor ❌ Limited

Tue 22:00 poor ❌ Limited

Tue 23:00 poor ❌ Limited

Wed 00:00 poor ❌ Limited

Wed 01:00 poor ❌ Limited

Wed 02:00 poor ❌ Limited

Wed 03:00 poor ❌ Limited

Wed 04:00 poor ❌ Limited

Wed 05:00 poor ❌ Limited

Wed 06:00 poor ❌ Limited

Wed 07:00 poor ❌ Limited

Wed 08:00 poor ❌ Limited

Wed 09:00 poor ❌ Limited

Wed 10:00 poor ❌ Limited

Wed 11:00 poor ❌ Limited

Wed 12:00 poor ❌ Limited

Wed 13:00 fair ⚠️ Fair

Wed 14:00 poor ❌ Limited

Wed 15:00 poor ❌ Limited

Wed 16:00 poor ❌ Limited

Wed 17:00 poor ❌ Limited

Wed 18:00 poor ❌ Limited

Wed 19:00 poor ❌ Limited

Wed 20:00 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 and safety gate (outside daylight scores lower).

Detailed hourly data table

Time	Wave (m)	Wind (m/s)	Sea temp (°C)	Status
Sun 21:00	1.58 · high	6.08 · high	30.10 · good	fair
Sun 22:00	1.56 · high	6.04 · high	30.10 · good	fair
Sun 23:00	1.54 · high	6.00 · high	30.10 · good	fair
Mon 00:00	1.52 · high	5.91 · high	30.10 · good	poor
Mon 01:00	1.50 · high	5.83 · high	30.10 · good	poor
Mon 02:00	1.48 · high	5.05 · good	30.10 · good	poor
Mon 03:00	1.46 · high	4.36 · good	30.10 · good	poor
Mon 04:00	1.44 · high	3.86 · good	30.00 · good	poor
Mon 05:00	1.40 · high	4.02 · good	30.00 · good	poor
Mon 06:00	1.38 · high	4.05 · good	30.00 · good	poor
Mon 07:00	1.38 · high	4.59 · good	30.00 · good	poor
Mon 08:00	1.36 · high	6.12 · high	29.90 · good	poor
Mon 09:00	1.36 · high	6.86 · high	29.90 · good	poor
Mon 10:00	1.36 · high	5.29 · good	29.90 · good	poor
Mon 11:00	1.38 · high	5.05 · good	29.90 · good	fair
Mon 12:00	1.38 · high	5.47 · high	29.90 · good	fair
Mon 13:00	1.40 · high	5.97 · high	29.90 · good	fair
Mon 14:00	1.44 · high	6.11 · high	29.90 · good	fair
Mon 15:00	1.46 · high	6.32 · high	30.00 · good	poor
Mon 16:00	1.50 · high	6.22 · high	30.00 · good	poor
Mon 17:00	1.52 · high	6.01 · high	30.00 · good	poor
Mon 18:00	1.56 · high	5.87 · high	30.10 · good	poor
Mon 19:00	1.54 · high	5.92 · high	30.10 · good	fair
Mon 20:00	1.54 · high	5.81 · high	30.10 · good	fair
Mon 21:00	1.52 · high	5.58 · high	30.10 · good	fair
Mon 22:00	1.50 · high	5.49 · high	30.10 · good	fair
Mon 23:00	1.48 · high	5.14 · good	30.10 · good	fair
Tue 00:00	1.46 · high	5.58 · high	30.10 · good	poor
Tue 01:00	1.46 · high	4.83 · good	30.10 · good	poor
Tue 02:00	1.46 · high	4.95 · good	30.00 · good	poor
Tue 03:00	1.46 · high	4.55 · good	30.00 · good	poor
Tue 04:00	1.42 · high	4.20 · good	30.00 · good	poor
Tue 05:00	1.38 · high	3.80 · good	29.90 · good	poor
Tue 06:00	1.34 · high	4.25 · good	29.90 · good	poor
Tue 07:00	1.32 · high	4.68 · good	29.90 · good	poor
Tue 08:00	1.32 · high	4.95 · good	29.90 · good	poor
Tue 09:00	1.30 · high	5.50 · high	29.90 · good	poor
Tue 10:00	1.32 · high	5.95 · high	29.80 · good	poor
Tue 11:00	1.32 · high	6.68 · high	29.80 · good	fair
Tue 12:00	1.34 · high	7.43 · high	29.80 · good	fair
Tue 13:00	1.36 · high	6.94 · high	29.80 · good	fair
Tue 14:00	1.40 · high	5.81 · high	29.80 · good	poor
Tue 15:00	1.42 · high	5.81 · high	29.90 · good	poor
Tue 16:00	1.42 · high	4.74 · good	29.90 · good	poor
Tue 17:00	1.42 · high	5.96 · high	29.90 · good	poor
Tue 18:00	1.42 · high	5.86 · high	29.90 · good	poor
Tue 19:00	1.40 · high	5.97 · high	29.90 · good	poor
Tue 20:00	1.40 · high	5.46 · high	29.90 · good	fair
Tue 21:00	1.38 · high	5.36 · good	29.90 · good	poor
Tue 22:00	1.40 · high	4.93 · good	29.90 · good	poor
Tue 23:00	1.44 · high	4.50 · good	29.90 · good	poor
Wed 00:00	1.46 · high	6.45 · high	29.90 · good	poor
Wed 01:00	1.44 · high	3.39 · good	29.90 · good	poor
Wed 02:00	1.40 · high	4.71 · good	29.80 · good	poor
Wed 03:00	1.38 · high	4.72 · good	29.80 · good	poor
Wed 04:00	1.34 · high	4.65 · good	29.80 · good	poor
Wed 05:00	1.28 · high	4.51 · good	29.70 · good	poor
Wed 06:00	1.24 · high	4.20 · good	29.70 · good	poor
Wed 07:00	1.20 · high	4.81 · good	29.90 · good	poor
Wed 08:00	1.18 · high	6.36 · high	29.80 · good	poor
Wed 09:00	1.18 · high	4.15 · good	29.80 · good	poor
Wed 10:00	1.20 · high	3.13 · good	29.80 · good	poor
Wed 11:00	1.20 · high	5.93 · high	29.80 · good	poor
Wed 12:00	1.22 · high	6.48 · high	29.80 · good	poor
Wed 13:00	1.24 · high	5.88 · high	29.80 · good	fair
Wed 14:00	1.26 · high	6.92 · high	29.80 · good	poor
Wed 15:00	1.28 · high	6.24 · high	29.80 · good	poor
Wed 16:00	1.30 · high	6.34 · high	29.80 · good	poor
Wed 17:00	1.32 · high	6.69 · high	29.80 · good	poor
Wed 18:00	1.34 · high	6.22 · high	29.80 · good	poor
Wed 19:00	1.34 · high	5.60 · high	29.80 · good	poor
Wed 20:00	1.36 · high	6.39 · high	29.80 · good	poor