Maine and New Hampshire · Wednesday, Sep 23

Jenness Beach

Updated Tue, Sep 22, 8:30 PM EDT

When to go

7:00 AM–8:00 AM

Windy · Low confidence

3.5–3.7 ft · Offshore waves · not face height

Wind: 11.0 kt · cross-shore

Forecast details

This is the best time in the forecast, though wind may make it choppy.

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.

7:00 AM–9:00 AM · America/New_York
Strong wind · up to 14.0 kt · reported gusts up to 20.8 kt
Caution: This is the best available wind comparison, not a favorable-wind label. Strong wind remains in the selected evidence.
Offshore waves: 3.5–3.9 ft across the period. Surf height unavailable. Tide data available; check the local tide response.
Wind source time: Sep 22, 7:45 PM EDT. 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 5.5 km from the mapped spot. Provider grid resolution is not established for this response.
Reference model hour: 11 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 NE 11 kt

Tide 5.5 ft rising

Wave, wind and tide details

Offshore model swellE 3.2 ft @ 5sValid 2026-09-23 08:00 · America/New_YorkMarine grid 42.9583, -70.7083 · offshore model, not a local measurement

Offshore model sea3.7 ft @ 5.5sSignificant wave height including wind waves and swell; not breaking surfValid 2026-09-23 08:00 · America/New_York

Model windNE 11 ktcross-shoreValid 2026-09-23 08:00 · America/New_York7.4 kt onshore component

Tide5.5 ftrisingHampton Harbor station 8429489 · predicted height relative to MLLWRetrieved Sep 22, 8:32 PM EDT · provider issue time unavailable70% of adjacent local low–high range · descriptive, not a safety rating

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 Jenness Beach
Time	Wind	Tide	Offshore swell
12 AM	N 4.9 ktcross-shore	5 ftfalling	E 2.5 ft @ 5s
1 AM	N 4.9 ktcross-shore	4 ftfalling	E 2.6 ft @ 5s
2 AM	N 5.3 ktcross-shore	3 ftfalling	E 2.7 ft @ 5s
3 AM	N 5.8 ktcross-shore	2 ftfalling	E 2.8 ft @ 5s
4 AM	N 6.2 ktcross-shore	1 ftrising	E 2.8 ft @ 5s
5 AM	NE 8.3 ktcross-shore	2 ftrising	ESE 2.8 ft @ 5s
6 AM	NE 10.3 ktcross-shore	3.5 ftrising	ESE 3.0 ft @ 5s
7 AM	NE 9.8 ktcross-shore	4.5 ftrising	E 3.1 ft @ 5s
8 AM	NE 11 ktcross-shore	5.5 ftrising	E 3.2 ft @ 5s
9 AM	NE 14 ktonshore	6.5 ftrising	E 3.1 ft @ 5s
10 AM	NE 14.8 ktonshore	7.5 ftfalling	E 3.1 ft @ 5s
11 AM	NE 14.7 ktonshore	6.5 ftfalling	E 3.0 ft @ 5s
Noon	NE 15.4 ktonshore	5.5 ftfalling	E 3.1 ft @ 6s
1 PM	NE 15.5 ktonshore	4.5 ftfalling	E 3.3 ft @ 6s
2 PM	NE 15.2 ktonshore	3.5 ftfalling	E 3.5 ft @ 6s
3 PM	NE 14.7 ktonshore	2.5 ftfalling	E 3.6 ft @ 6s
4 PM	NE 14 ktonshore	1.5 ftrising	E 3.8 ft @ 5s
5 PM	NE 13.6 ktonshore	2.5 ftrising	E 3.9 ft @ 5s
6 PM	ENE 12.8 ktonshore	3.5 ftrising	E 4.3 ft @ 5s
7 PM	ENE 12.2 ktonshore	5 ftrising	E 4.5 ft @ 6s
8 PM	ENE 11.4 ktonshore	6 ftrising	E 4.9 ft @ 6s
9 PM	ENE 11 ktonshore	7.5 ftrising	ESE 4.9 ft @ 6s
10 PM	ENE 10.4 ktonshore	8.5 ftfalling	ESE 4.9 ft @ 6s
11 PM	ENE 9.7 ktonshore	7 ftfalling	ESE 4.9 ft @ 6s

12 AMUnavailable

WindN 4.9 ktcross-shoreTide5 ftfallingOffshore swellE 2.5 ft @ 5s

1 AMUnavailable

WindN 4.9 ktcross-shoreTide4 ftfallingOffshore swellE 2.6 ft @ 5s

2 AMUnavailable

WindN 5.3 ktcross-shoreTide3 ftfallingOffshore swellE 2.7 ft @ 5s

3 AMUnavailable

WindN 5.8 ktcross-shoreTide2 ftfallingOffshore swellE 2.8 ft @ 5s

4 AMUnavailable

WindN 6.2 ktcross-shoreTide1 ftrisingOffshore swellE 2.8 ft @ 5s

5 AMUnavailable

WindNE 8.3 ktcross-shoreTide2 ftrisingOffshore swellESE 2.8 ft @ 5s

6 AMUnavailable

WindNE 10.3 ktcross-shoreTide3.5 ftrisingOffshore swellESE 3.0 ft @ 5s

7 AMUnavailable

WindNE 9.8 ktcross-shoreTide4.5 ftrisingOffshore swellE 3.1 ft @ 5s

8 AMUnavailable

WindNE 11 ktcross-shoreTide5.5 ftrisingOffshore swellE 3.2 ft @ 5s

9 AMUnavailable

WindNE 14 ktonshoreTide6.5 ftrisingOffshore swellE 3.1 ft @ 5s

10 AMUnavailable

WindNE 14.8 ktonshoreTide7.5 ftfallingOffshore swellE 3.1 ft @ 5s

11 AMUnavailable

WindNE 14.7 ktonshoreTide6.5 ftfallingOffshore swellE 3.0 ft @ 5s

NoonUnavailable

WindNE 15.4 ktonshoreTide5.5 ftfallingOffshore swellE 3.1 ft @ 6s

1 PMUnavailable

WindNE 15.5 ktonshoreTide4.5 ftfallingOffshore swellE 3.3 ft @ 6s

2 PMUnavailable

WindNE 15.2 ktonshoreTide3.5 ftfallingOffshore swellE 3.5 ft @ 6s

3 PMUnavailable

WindNE 14.7 ktonshoreTide2.5 ftfallingOffshore swellE 3.6 ft @ 6s

4 PMUnavailable

WindNE 14 ktonshoreTide1.5 ftrisingOffshore swellE 3.8 ft @ 5s

5 PMUnavailable

WindNE 13.6 ktonshoreTide2.5 ftrisingOffshore swellE 3.9 ft @ 5s

6 PMUnavailable

WindENE 12.8 ktonshoreTide3.5 ftrisingOffshore swellE 4.3 ft @ 5s

7 PMUnavailable

WindENE 12.2 ktonshoreTide5 ftrisingOffshore swellE 4.5 ft @ 6s

8 PMUnavailable

WindENE 11.4 ktonshoreTide6 ftrisingOffshore swellE 4.9 ft @ 6s

9 PMUnavailable

WindENE 11 ktonshoreTide7.5 ftrisingOffshore swellESE 4.9 ft @ 6s

10 PMUnavailable

WindENE 10.4 ktonshoreTide8.5 ftfallingOffshore swellESE 4.9 ft @ 6s

11 PMUnavailable

WindENE 9.7 ktonshoreTide7 ftfallingOffshore swellESE 4.9 ft @ 6s

Tide

Hampton Harbor station 8429489 · MLLW

Interpolated tide height Recommended window

About this spot

Model-grid forecast requested at the mapped coordinate; reef, headland, and nearshore transformations are unresolved. Sandbar break.

Mapped spot coordinate: 42.99, -70.76.

Mainland · Coast not verified · Ocean-facing bearing 90° · Location provenance

Model request point: Jenness Beach (42.99, -70.76). Model output times describe valid conditions; the provider does not expose the model run issue time in this response.

Forecast sources

Data coverage 3/4 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_EAST · spot-level model point

Official breaking-surf report not connected for Maine and New HampshireUnavailableUnavailable · Unavailable

US National Weather Service Surf Zone Forecast
No current NWS surf-zone period passed the explicit per-spot forecast-zone assignment.UnavailableNo source time
NOAA NDBC real-time station files
Current buoy observations are not forecasts for the selected future date.Not applicableNo source time
NOAA CO-OPS Tides and Currents API
Hampton Harbor station 8429489; predicted high/low events above MLLW, converted to feet. Timestamp is retrieval time; provider issue time is not supplied.CurrentSep 22, 8:32 PM EDT
Open-Meteo Marine API
1 of 1 configured model points availableCurrentSep 22, 7:45 PM EDT
Open-Meteo Weather API
1 of 1 configured model points availableCurrentSep 22, 7:45 PM EDT
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.