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Hainan · Today

Houhai Bay

Updated Wed, Sep 23, 7:40 AM GMT+8

When to go

7:42 AM–8:00 AM

Looks good · Low confidence

1.5–1.5 ft · Offshore waves · not face height

Wind: 5.4 kt · cross-shore

Forecast details

Light wind should keep the water smoother.

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.

8:00 AM–10:00 AM · Asia/Shanghai
Unfavorable wind · up to 8.4 kt · reported gusts up to 19.4 kt
Caution: This is the best available wind comparison, not a favorable-wind label. The selected wind is unfavorable for this break.
Offshore waves: 1.5–1.6 ft across the period. Surf height unavailable. Tide data unavailable.
Wind source time: Sep 23, 7:30 AM GMT+8. This is not the model run issue time.

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 7.7 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.
Tide unavailable: assessment incomplete, especially at shallow reef breaks.
A mapped coordinate does not establish nearshore grid resolution or terrain/shelter accuracy.

Wind NE 5.4 kt

Tide Unavailable

Wave, wind and tide details

Offshore model swellESE 0.9 ft @ 4sValid 2026-09-23 08:00 · Asia/ShanghaiMarine grid 18.2917, 109.7917 · offshore model, not a local measurement

Offshore model sea1.5 ft @ 3.8sSignificant wave height including wind waves and swell; not breaking surfValid 2026-09-23 08:00 · Asia/Shanghai

Model windNE 5.4 ktcross-shoreValid 2026-09-23 08:00 · Asia/Shanghai3.2 kt onshore component

TideUnavailableunavailableNo verified local tide station connected; no tide height estimated

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 Houhai Bay
Time	Wind	Tide	Offshore swell
12 AM	NE 7.9 ktonshore	Unavailableunavailable	ESE 0.9 ft @ 4s
1 AM	NE 7.2 ktonshore	Unavailableunavailable	ESE 1.0 ft @ 3s
2 AM	NE 6.4 ktcross-shore	Unavailableunavailable	ESE 1.1 ft @ 3s
3 AM	NE 5.6 ktcross-shore	Unavailableunavailable	ESE 1.1 ft @ 3s
4 AM	NNE 5.6 ktcross-shore	Unavailableunavailable	E 1.1 ft @ 3s
5 AM	N 4.8 ktcross-shore	Unavailableunavailable	E 1.1 ft @ 3s
6 AM	N 3.6 ktcross-shore	Unavailableunavailable	ESE 1.1 ft @ 3s
7 AM	NNE 4.4 ktcross-shore	Unavailableunavailable	ESE 0.9 ft @ 4s
8 AM	NE 5.4 ktcross-shore	Unavailableunavailable	ESE 0.9 ft @ 4s
9 AM	NE 7.2 ktcross-shore	Unavailableunavailable	ESE 0.9 ft @ 4s
10 AM	ENE 8.4 ktonshore	Unavailableunavailable	ESE 0.8 ft @ 4s
11 AM	ENE 8.7 ktonshore	Unavailableunavailable	ESE 0.8 ft @ 4s
Noon	E 8.3 ktonshore	Unavailableunavailable	ESE 0.8 ft @ 4s
1 PM	E 8.1 ktonshore	Unavailableunavailable	ESE 0.9 ft @ 4s
2 PM	E 10 ktonshore	Unavailableunavailable	SE 0.9 ft @ 4s
3 PM	E 9.8 ktonshore	Unavailableunavailable	ESE 0.9 ft @ 4s
4 PM	E 9.4 ktonshore	Unavailableunavailable	ESE 0.9 ft @ 3s
5 PM	E 10.2 ktonshore	Unavailableunavailable	ESE 0.9 ft @ 3s
6 PM	ENE 8.6 ktonshore	Unavailableunavailable	ESE 0.9 ft @ 3s
7 PM	ENE 7.4 ktonshore	Unavailableunavailable	ESE 0.8 ft @ 3s
8 PM	ENE 8.5 ktonshore	Unavailableunavailable	ESE 0.8 ft @ 3s
9 PM	ENE 7.8 ktonshore	Unavailableunavailable	ESE 0.8 ft @ 3s
10 PM	ENE 8.4 ktonshore	Unavailableunavailable	ESE 0.9 ft @ 3s
11 PM	NE 8.1 ktonshore	Unavailableunavailable	ESE 0.9 ft @ 3s

12 AMUnavailable

WindNE 7.9 ktonshoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 4s

1 AMUnavailable

WindNE 7.2 ktonshoreTideUnavailableunavailableOffshore swellESE 1.0 ft @ 3s

2 AMUnavailable

WindNE 6.4 ktcross-shoreTideUnavailableunavailableOffshore swellESE 1.1 ft @ 3s

3 AMUnavailable

WindNE 5.6 ktcross-shoreTideUnavailableunavailableOffshore swellESE 1.1 ft @ 3s

4 AMUnavailable

WindNNE 5.6 ktcross-shoreTideUnavailableunavailableOffshore swellE 1.1 ft @ 3s

5 AMUnavailable

WindN 4.8 ktcross-shoreTideUnavailableunavailableOffshore swellE 1.1 ft @ 3s

6 AMUnavailable

WindN 3.6 ktcross-shoreTideUnavailableunavailableOffshore swellESE 1.1 ft @ 3s

7 AMUnavailable

WindNNE 4.4 ktcross-shoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 4s

8 AMUnavailable

WindNE 5.4 ktcross-shoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 4s

9 AMUnavailable

WindNE 7.2 ktcross-shoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 4s

10 AMUnavailable

WindENE 8.4 ktonshoreTideUnavailableunavailableOffshore swellESE 0.8 ft @ 4s

11 AMUnavailable

WindENE 8.7 ktonshoreTideUnavailableunavailableOffshore swellESE 0.8 ft @ 4s

NoonUnavailable

WindE 8.3 ktonshoreTideUnavailableunavailableOffshore swellESE 0.8 ft @ 4s

1 PMUnavailable

WindE 8.1 ktonshoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 4s

2 PMUnavailable

WindE 10 ktonshoreTideUnavailableunavailableOffshore swellSE 0.9 ft @ 4s

3 PMUnavailable

WindE 9.8 ktonshoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 4s

4 PMUnavailable

WindE 9.4 ktonshoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 3s

5 PMUnavailable

WindE 10.2 ktonshoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 3s

6 PMUnavailable

WindENE 8.6 ktonshoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 3s

7 PMUnavailable

WindENE 7.4 ktonshoreTideUnavailableunavailableOffshore swellESE 0.8 ft @ 3s

8 PMUnavailable

WindENE 8.5 ktonshoreTideUnavailableunavailableOffshore swellESE 0.8 ft @ 3s

9 PMUnavailable

WindENE 7.8 ktonshoreTideUnavailableunavailableOffshore swellESE 0.8 ft @ 3s

10 PMUnavailable

WindENE 8.4 ktonshoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 3s

11 PMUnavailable

WindNE 8.1 ktonshoreTideUnavailableunavailableOffshore swellESE 0.9 ft @ 3s

Tide

Local tide station unavailable

Tide predictions are unavailable for this period.

About this spot

Model-grid forecast requested at the mapped coordinate; reef, headland, and nearshore transformations are unresolved. Beach break. Central surfable beach pin inside the mapped Houhai beach; locally east-facing although assigned to Hainan's official southern marine forecast sector.

Mapped spot coordinate: 18.2675, 109.723.

Hainan Island · Hainan Island east-facing pocket beach at the south end of Haitang Bay, Sanya · Ocean-facing bearing 98° · Location provenance

Model request point: Houhai Bay (18.2675, 109.723). Model output times describe valid conditions; the provider does not expose the model run issue time in this response.

Forecast sources

Data coverage 2/7 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 D · MODEL_FIRST_ASIA · spot-level model point

National or regional meteorological marine bulletin
Warnings and official marine narrative where no structured surf feed exists; market adapter or station mapping not connectedUnavailableNo source time
The Buoy API
Normalized nearest-buoy discovery and readings; market adapter or station mapping not connectedUnavailableNo source time
South China Sea Forecast Center tide predictions
Official astronomical high and low tide predictions; market adapter or station mapping not connectedUnavailableNo source time
WorldTides API
Tide predictions and station lookup; market adapter or station mapping not connectedUnavailableNo source time
Open-Meteo Marine API
1 of 1 configured model points availableCurrentSep 23, 7:30 AM GMT+8
Open-Meteo Weather API
1 of 1 configured model points availableCurrentSep 23, 7:30 AM GMT+8
Copernicus Marine Global Ocean Waves
Independent wave-model backend and cross-check; market adapter or station mapping not connectedUnavailableNo source time
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.