Snorkelling and diving from a charter boat in the British Virgin Islands
British Virgin Islands: snorkel and dive sites by boat, park fees, anchoring rules, sea temperature by month (NOAA) and wetsuit advice. Sourced.
Sea temperature
26.1–28.9 °C
February to September, NOAA 1991–2020
Source: NOAA PSL (NOAA/NCEI OISST v2.1), checked
Warm water (≥24 °C)
All year
Our threshold on NOAA means
Park fee
Not verified
No fee confirmed
Checked
28 Oct 2026
2 official, 0 secondary
Yes: the National Parks Trust runs day moorings at marine parks such as the Wreck of the Rhone and The Baths, with a 90-minute limit, anchoring is banned in the Rhone park, and all fishing and shell collecting is illegal in the parks. The sea averages between 26.1 °C (February) and 28.9 °C (September) by NOAA's 1991–2020 means at our reference point, so it stays at 24 °C or more all year and by our rule of thumb a rash vest or 1–2 mm shorty is enough even in the coolest month.
Checked 28 Oct 2026 against 2 official and 0 secondary sources; sea temperature from NOAA (sources). Anything we could not confirm is labelled (how to read the labels). Park rules change: check before you go.
Snorkel and dive sites you can reach by charter boat in the British Virgin Islands
| Site | Type | Where | What the source says |
|---|---|---|---|
| Wreck of the Rhone Marine National Park | wreck | Salt Island | Anchoring is prohibited in the park. If every mooring is taken, anchor in an acceptable area outside and come in by tender to the dinghy moorings, or wait for a mooring. (National Parks Trust of the Virgin Islands) |
| The Baths National Park | national park | Virgin Gorda | A flag system tells boats whether to use the moorings: red, do not use the mooring and no beach access; yellow, use with extreme caution; green, moorings available; purple, marine pests such as jellyfish in the water. (National Parks Trust of the Virgin Islands) |
These are the sites we could document from official or labelled sources, not a full list. Fishing is a separate question: fishing rules in the British Virgin Islands.
Sea temperature in the British Virgin Islands by month
The sea is warmest in September (28.9 °C) and coolest in February (26.1 °C). ● marks our warm-water months (24 °C or more): all year.
| Month | Sea surface (NOAA) | Air (NASA POWER) | Our wetsuit rule of thumb | Catamaran, avg per week (12 Knots) |
|---|---|---|---|---|
| January | 26.4 °C ● | 26.2 °C | rash vest or 1–2 mm shorty | €8,813 |
| February | 26.1 °C ● | 25.9 °C | rash vest or 1–2 mm shorty | €9,390 |
| March | 26.1 °C ● | 26.0 °C | rash vest or 1–2 mm shorty | €9,773 |
| April | 26.7 °C ● | 26.5 °C | rash vest or 1–2 mm shorty | €9,097 |
| May | 27.3 °C ● | 27.4 °C | rash vest or 1–2 mm shorty | €8,222 |
| June | 28.0 °C ● | 28.2 °C | swimsuit or rash vest | €7,848 |
| July | 28.1 °C ● | 28.6 °C | swimsuit or rash vest | €7,448 |
| August | 28.6 °C ● | 28.9 °C | swimsuit or rash vest | €6,868 |
| September | 28.9 °C ● | 29.1 °C | swimsuit or rash vest | €6,816 |
| October | 28.8 °C ● | 28.8 °C | swimsuit or rash vest | €7,134 |
| November | 28.2 °C ● | 28.0 °C | swimsuit or rash vest | €8,100 |
| December | 27.2 °C ● | 27.0 °C | rash vest or 1–2 mm shorty | €8,885 |
Of the twelve months (all at 24 °C or more), the cheapest on 12 Knots' average weekly catamaran price is September at €6,816 per week (12 Knots, checked 27 Oct 2026), with the sea at 28.9 °C (our comparison). It falls in the Atlantic hurricane season (1 June–30 November) (NOAA National Hurricane Center, checked 27 Oct 2026): see the best time to charter in the British Virgin Islands.
Sea surface: NOAA OISST v2.1 1991–2020 monthly mean for the 1/4° cell centred on 18.375° N, 64.625° W (Sir Francis Drake Channel) (NOAA PSL (NOAA/NCEI OISST v2.1), checked 28 Oct 2026); the sites above may be warmer or cooler, and shallow bays warm up faster. Air: our 10-year NASA POWER mean at Road Town, Tortola (NASA POWER, checked 28 Oct 2026). Prices are asking prices that mix bareboat and crewed listings.
Mooring, anchoring and park rules for your boat
- National Parks Trust moorings are for day use only, with a 90-minute limit that "must be strictly observed"; all mooring areas are 5 mph no-wake zones. (National Parks Trust of the Virgin Islands)
- Vessels over 70 ft or 35 tons may not use the mooring system; do not leave a boat unattended on a Trust mooring; dinghies must use the dinghy moorings, not the dive or day-use moorings. (National Parks Trust of the Virgin Islands)
- In the marine parks all fishing (spearfishing included), lobstering and the collection of live shells are illegal, and nothing may be damaged or removed. (National Parks Trust of the Virgin Islands)
Can I scuba dive from the boat? Permits and dive centres
- Display a dive flag when diving. (National Parks Trust of the Virgin Islands)
- [Not verified] Whether visitors may dive the parks without a licensed dive operator: not verified.
Park and mooring fees
| Fee | Amount | Status | Source |
|---|---|---|---|
| Marine Conservation Permit (National Parks Trust) | Not verified (The Trust sells the permit online, but its page shows no price.) | not verified | National Parks Trust of the Virgin Islands |
Underwater visibility
[Not verified] We found no official or survey source for underwater visibility, so we give no figure. Ask the local dive centre on the day.
What wetsuit do I need in the British Virgin Islands?
From September's 28.9 °C our rule of thumb gives a swimsuit or rash vest; in February (26.1 °C) a rash vest or 1–2 mm shorty. The month-by-month column is in the table above.
Our rule of thumb for snorkelling, applied to the monthly mean: 28 °C or more: swimsuit or rash vest; 26–28 °C: rash vest or 1–2 mm shorty; 24–26 °C: 3 mm shorty; 21–24 °C: 3 mm full wetsuit; 18–21 °C: 5 mm full wetsuit; below 18 °C: 7 mm wetsuit, or a drysuit for diving. Divers lose heat faster and meet cooler water at depth: go one band thicker. People feel cold differently; this is a guide, not a source's advice.
| Mean sea temperature | Our rule of thumb for snorkelling |
|---|---|
| 28 °C or more | swimsuit or rash vest |
| 26–28 °C | rash vest or 1–2 mm shorty |
| 24–26 °C | 3 mm shorty |
| 21–24 °C | 3 mm full wetsuit |
| 18–21 °C | 5 mm full wetsuit |
| Below 18 °C | 7 mm wetsuit, or a drysuit for diving |
See boats in the British Virgin Islands
See catamarans for rent in the British Virgin Islands on SamBoat
Check the park rules above and the boat's own kit (snorkel gear, dinghy, dive-ladder) with the operator before you book; listings and prices on SamBoat are SamBoat's own. We may earn a commission if you book through our links, at no extra cost to you (disclosure).
What we could not verify
- The price of the Marine Conservation Permit and how a charter guest gets it.
- Rules for other sites (Norman Island caves, the Indians) beyond the general park guidelines.
- Whether you must dive with a licensed operator.
- Underwater visibility.
How to read the labels
- [Secondary source]: From a newspaper, NGO, guide or tour operator; not official.
- [Not verified]: We could not confirm it. We leave it open rather than guess.
- No label: Read in an official text: government, park authority, ministry or official tourism board.
Sea temperatures are NOAA's; the wetsuit column, the 24 °C warm-water mark and any sum or comparison are ours and say so. Park rules change and some are seasonal: check with the park, your charter base or a local dive centre before you go.
Sources
- National Parks Trust of the Virgin Islands: Park tickets & Marine Conservation Permit: marine park guidelines (official), checked 28 Oct 2026.
- NOAA PSL (NOAA/NCEI OISST v2.1): NOAA High-resolution Blended Analysis: OISST v2.1 long-term mean monthly sea surface temperature, 1991–2020 (sst.mon.ltm.1991-2020.nc) (official), checked 28 Oct 2026.
- NASA POWER: Prediction Of Worldwide Energy Resources: Monthly API (T2M, WS10M) (official), air temperature, pulled 28 Oct 2026.
- 12 Knots: Catamaran charter in the BVI (secondary, prices), checked 27 Oct 2026.
Method: methodology. Data: JSON.
More on the British Virgin Islands
- Snorkelling and diving by charter boat: every destination compared
- British Virgin Islands yacht and catamaran charter: prices, season and licence
- Best time to charter in the British Virgin Islands
- Fishing rules in the British Virgin Islands
- Do I need a licence to rent a boat in the British Virgin Islands?
- True cost of a week in the British Virgin Islands: per person, all extras
Frequently asked questions
Can you snorkel and dive from a charter boat in the British Virgin Islands?
Yes: the National Parks Trust runs day moorings at marine parks such as the Wreck of the Rhone and The Baths, with a 90-minute limit, anchoring is banned in the Rhone park, and all fishing and shell collecting is illegal in the parks. The sea averages between 26.1 °C (February) and 28.9 °C (September) by NOAA's 1991–2020 means at our reference point, so it stays at 24 °C or more all year and by our rule of thumb a rash vest or 1–2 mm shorty is enough even in the coolest month.
How warm is the sea in the British Virgin Islands?
By NOAA's 1991–2020 averages at our reference point (Sir Francis Drake Channel), the sea surface is warmest in September at 28.9 °C and coolest in February at 26.1 °C. Months at 24 °C or more: all year.
Do I need a wetsuit to snorkel in the British Virgin Islands?
By our rule of thumb (not a source's advice): a swimsuit or rash vest in September and a rash vest or 1–2 mm shorty in February; divers should go one band thicker.
Do I need a dive centre to scuba dive in the British Virgin Islands?
Display a dive flag when diving. Not verified: Whether visitors may dive the parks without a licensed dive operator: not verified.
Are there park fees or mooring rules for boats in the British Virgin Islands?
National Parks Trust moorings are for day use only, with a 90-minute limit that "must be strictly observed"; all mooring areas are 5 mph no-wake zones. Vessels over 70 ft or 35 tons may not use the mooring system; do not leave a boat unattended on a Trust mooring; dinghies must use the dinghy moorings, not the dive or day-use moorings. Fees: not verified.