St. Thomas North Coast · Today

Hull Bay

NWS San Juan · VIZ001; official reef-face range: 2–2 ft

Updated Tue, Sep 22, 7:40 PM AST

When to go

No clear pick yet

There is not enough current forecast information to choose a spot.

Check tomorrow →

What's missing?

No usable upcoming daylight wave or wind evidence is available. Check Tomorrow if today’s daylight has ended.

Other wind windows

Plan around the wind

The best available upcoming daylight wind sample to compare with the wave evidence. This compares wind only; wave size, tide suitability, and hazards can change your choice.

No upcoming daytime sample has current, finite wind evidence.

How these periods are chosen

The planner prefers three consecutive hourly samples covering two daylight hours, but retains shorter one- or two-sample evidence when that is all the forecast provides. Light wind means at most 6 kt. Moderate offshore means at most 12 kt from land toward the sea when shore orientation is verified. Strong wind or known gusts of 20 kt or more remain visible as cautions instead of making the entire comparison disappear. These are comparison labels, not locally tested surf-quality or safety ratings. Missing gusts remain unknown. Terrain shelter, currents, closures, and your ability are not assessed.

Forecast confidence

Returned marine grid point is 0.7 km from the mapped spot. Provider grid resolution is not established for this response.
Reference model hour: 0 hours from now; historical residuals do not measure forecast lead-time error.
No accepted local model for these inputs: missing history, unsupported direction/period/height, or failed historical validation.
A mapped coordinate does not establish nearshore grid resolution or terrain/shelter accuracy.

Wind E 12.4 kt

Tide 1 ft falling

Wave, wind and tide details

Offshore model swellS 0.9 ft @ 4sValid 2026-09-22 20:00 · America/St_ThomasMarine grid 18.3750, -64.9583 · offshore model, not a local measurement

Offshore model sea2.0 ft @ 4.5sSignificant wave height including wind waves and swell; not breaking surfValid 2026-09-22 20:00 · America/St_Thomas

Model windE 12.4 ktcross-shoreValid 2026-09-22 20:00 · America/St_Thomas5.9 kt offshore component

Tide1 ftfallingNOAA Magens Bay 9751693 · 3 km from spot · predicted height relative to MLLWRetrieved Sep 22, 7:48 PM AST · provider issue time unavailable72% of adjacent local low–high range · descriptive, not a safety rating

NWS San Juan · VIZ001

Rip Current Risk*...........Low. Surf Height.................Around 2 feet. Weather.....................Partly sunny. Scattered showers. Winds.......................East winds 10 to 15 mph.

TODAYOfficial breaking-surf height for St Thomas, St John and adjacent islands VI; island-zone forecast, not a calibrated break transformationIssued Sep 22, 3:43 AM AST

Surf height unavailable. Coastal and offshore waves are not breaking-wave heights.

Surf and wind

Recommended window: No recommended window

Breaking surf is not reliably resolved. Hourly offshore swell and wind inputs are listed below.

Hourly forecast

Hourly surf forecast for Hull Bay
Time	Wind	Tide	Offshore swell
12 AM	ESE 9 ktoffshore	0.5 ftnear low	S 1.0 ft @ 4s
1 AM	ESE 8.9 ktoffshore	0.5 ftrising	S 1.0 ft @ 4s
2 AM	ESE 8.2 ktcross-shore	0.5 ftrising	S 1.0 ft @ 4s
3 AM	ESE 8.4 ktcross-shore	1 ftrising	S 1.0 ft @ 4s
4 AM	ESE 8.9 ktcross-shore	1 ftrising	S 1.0 ft @ 4s
5 AM	ESE 9.7 ktcross-shore	1 ftnear high	S 1.0 ft @ 4s
6 AM	ESE 9.8 ktcross-shore	1 ftfalling	S 1.0 ft @ 4s
7 AM	ESE 10.5 ktoffshore	1 ftfalling	S 1.0 ft @ 4s
8 AM	ESE 10.6 ktcross-shore	0.5 ftfalling	S 1.0 ft @ 4s
9 AM	ESE 10.4 ktoffshore	0.5 ftfalling	S 0.9 ft @ 4s
10 AM	ESE 10.4 ktoffshore	0.5 ftfalling	S 0.9 ft @ 4s
11 AM	ESE 10.6 ktcross-shore	0.5 ftrising	S 0.9 ft @ 4s
Noon	ESE 10.2 ktcross-shore	0.5 ftrising	S 0.9 ft @ 4s
1 PM	ESE 10.4 ktoffshore	0.5 ftrising	S 0.9 ft @ 4s
2 PM	ESE 10.3 ktcross-shore	1 ftrising	S 0.9 ft @ 4s
3 PM	ESE 9.7 ktcross-shore	1 ftrising	S 0.9 ft @ 4s
4 PM	ESE 9.6 ktcross-shore	1 ftrising	S 0.9 ft @ 4s
5 PM	E 11 ktcross-shore	1 ftrising	S 0.9 ft @ 4s
6 PM	E 11.2 ktcross-shore	1.5 ftnear high	S 0.9 ft @ 4s
7 PM	E 12 ktcross-shore	1.5 ftfalling	S 0.9 ft @ 4s
8 PM	E 12.4 ktcross-shore	1 ftfalling	S 0.9 ft @ 4s
9 PM	E 12.1 ktcross-shore	1 ftfalling	SSE 1.0 ft @ 4s
10 PM	E 11.9 ktcross-shore	1 ftfalling	SSE 1.0 ft @ 4s
11 PM	E 12 ktcross-shore	1 ftfalling	SE 1.1 ft @ 4s

12 AMUnavailable

WindESE 9 ktoffshoreTide0.5 ftnear lowOffshore swellS 1.0 ft @ 4s

1 AMUnavailable

WindESE 8.9 ktoffshoreTide0.5 ftrisingOffshore swellS 1.0 ft @ 4s

2 AMUnavailable

WindESE 8.2 ktcross-shoreTide0.5 ftrisingOffshore swellS 1.0 ft @ 4s

3 AMUnavailable

WindESE 8.4 ktcross-shoreTide1 ftrisingOffshore swellS 1.0 ft @ 4s

4 AMUnavailable

WindESE 8.9 ktcross-shoreTide1 ftrisingOffshore swellS 1.0 ft @ 4s

5 AMUnavailable

WindESE 9.7 ktcross-shoreTide1 ftnear highOffshore swellS 1.0 ft @ 4s

6 AMUnavailable

WindESE 9.8 ktcross-shoreTide1 ftfallingOffshore swellS 1.0 ft @ 4s

7 AMUnavailable

WindESE 10.5 ktoffshoreTide1 ftfallingOffshore swellS 1.0 ft @ 4s

8 AMUnavailable

WindESE 10.6 ktcross-shoreTide0.5 ftfallingOffshore swellS 1.0 ft @ 4s

9 AMUnavailable

WindESE 10.4 ktoffshoreTide0.5 ftfallingOffshore swellS 0.9 ft @ 4s

10 AMUnavailable

WindESE 10.4 ktoffshoreTide0.5 ftfallingOffshore swellS 0.9 ft @ 4s

11 AMUnavailable

WindESE 10.6 ktcross-shoreTide0.5 ftrisingOffshore swellS 0.9 ft @ 4s

NoonUnavailable

WindESE 10.2 ktcross-shoreTide0.5 ftrisingOffshore swellS 0.9 ft @ 4s

1 PMUnavailable

WindESE 10.4 ktoffshoreTide0.5 ftrisingOffshore swellS 0.9 ft @ 4s

2 PMUnavailable

WindESE 10.3 ktcross-shoreTide1 ftrisingOffshore swellS 0.9 ft @ 4s

3 PMUnavailable

WindESE 9.7 ktcross-shoreTide1 ftrisingOffshore swellS 0.9 ft @ 4s

4 PMUnavailable

WindESE 9.6 ktcross-shoreTide1 ftrisingOffshore swellS 0.9 ft @ 4s

5 PMUnavailable

WindE 11 ktcross-shoreTide1 ftrisingOffshore swellS 0.9 ft @ 4s

6 PMUnavailable

WindE 11.2 ktcross-shoreTide1.5 ftnear highOffshore swellS 0.9 ft @ 4s

7 PMUnavailable

WindE 12 ktcross-shoreTide1.5 ftfallingOffshore swellS 0.9 ft @ 4s

8 PMUnavailable

WindE 12.4 ktcross-shoreTide1 ftfallingOffshore swellS 0.9 ft @ 4s

9 PMUnavailable

WindE 12.1 ktcross-shoreTide1 ftfallingOffshore swellSSE 1.0 ft @ 4s

10 PMUnavailable

WindE 11.9 ktcross-shoreTide1 ftfallingOffshore swellSSE 1.0 ft @ 4s

11 PMUnavailable

WindE 12 ktcross-shoreTide1 ftfallingOffshore swellSE 1.1 ft @ 4s

Tide

NOAA Magens Bay 9751693 · 3 km from spot · MLLW

Interpolated tide height Recommended window

About this spot

Model-grid forecast requested at the mapped coordinate; reef, headland, and nearshore transformations are unresolved. Reef break. Government of the U.S. Virgin Islands BEACH monitoring coordinate for named Hull Bay; north-facing reef/bay exposure.

Mapped spot coordinate: 18.37043, -64.95313.

St. Thomas · north · Ocean-facing bearing 337.5° · Location provenance

Model request point: Hull Bay (18.37043, -64.95313). Model output times describe valid conditions; the provider does not expose the model run issue time in this response.

Forecast sources

Data coverage 4/6 sources

Source availability is not forecast accuracy. Where an empirical model passes historical testing, its error and interval coverage are shown above. Source count cannot increase that confidence.

Coverage tier A+ · US_PR_VI · spot-level model point

NWS San Juan · VIZ001; official reef-face range2–2 ftCurrent · Sep 22, 3:43 AM AST

NWS San Juan · VIZ001
NWS San Juan · VIZ001; Official breaking-surf height for St Thomas, St John and adjacent islands VI; island-zone forecast, not a calibrated break transformationCurrentSep 22, 3:43 AM AST
CARICOOS North of St. Thomas buoy VI2 · 24 km from Hull Bay
CARICOOS North of St. Thomas buoy VI2 · 24 km from Hull Bay; CARICOOS measured significant wave height (Hs); seaward buoy observation, not breaking-wave face heightStaleSep 6, 1:00 PM AST
NOAA NDBC real-time station files
No current island-local wave observation is available; stale CARICOOS records are labeled and never shown as current.UnavailableNo source time
NOAA CO-OPS Tides and Currents API
NOAA Magens Bay 9751693 · 3 km from spot; predicted high/low events above MLLW, converted to feet. Timestamp is retrieval time; provider issue time is not supplied.CurrentSep 22, 7:48 PM AST
Open-Meteo Marine API
1 of 1 configured model points availableCurrentSep 22, 7:45 PM AST
Open-Meteo Weather API
1 of 1 configured model points availableCurrentSep 22, 7:45 PM AST
Surf-Forecast public pages
Spot discovery and break-specific HTML fallbackNot applicableNo source time
Surfline public spot pages
Break-specific comparison, cams, and metadataNot applicableNo source time

How best guesses are made

Best guesses combine usable wave and wind evidence, with qualitative confidence and specific limitations. A missing tide or local surf-height model does not prevent useful guidance. Tide levels use the named station datum; their effect at this break remains uncertain. Wind direction is relative to the mapped beach orientation, without calibrated terrain or shelter effects. The comparison is a heuristic, not a measured quality rating.