New London Harbor
Doable, but keep one eye on the sky and the other on the chop.
Sunny · 78° · 6 kt wind2 PM–6 PM is the best 4-hour window inside your selected limits.
For Pursuit 235 · 4 hours · limits 15 kt / 2.5 ftMake it yours, skipper
The flag re-reads the water for your boat and your day.
Your boat
Time on the water
Your comfort line: 15 kt wind · 2.5 ft seas
Pick your day
Seven days, one honest flag each.
Showing hourly detail for today. Each flag uses that day's own forecast.
Daylight forecast
7 NWS grid hours
3 turns today
NDBC 44097
NDBC 44097 · observed 7/17/2026, 1:26:00 PM EDT
How the day develops
Wind, waves, and tide stay aligned to the same daylight hours.
Sustained wind in knots. The dashed line is your selected boat limit.
Wave height from the NWS marine grid, with clearly identified buoy-based estimates for gaps.
Predicted water level in feet relative to MLLW from NOAA CO-OPS.
Hour by hour
Daylight only. The useful part of your day.
8 kt
5 kt
4 ktView exact hourly readings
How this forecast is built
5 of 5 inputs reporting. Stations, locations, and roles are shown below.
Resolved directly from the destination coordinates.
The buoy fills wave gaps and supplies observations.
Predicted heights and high/low timing.
Latest available buoy observation.
Source geography
Where these readings come from
Dashed lines connect this destination to the stations contributing marine, tide, and aviation context.
- Forecast pointNew London HarborNWS forecast point
- BuoyBlock Island · 4409749.2 NM away
- Tide gaugeNew London · 84614900.8 NM away
- AviationGroton-New London · KGON2.2 NM away
NWS hourly forecast
RoleSupplies the hourly wind, sky, temperature, and precipitation forecast at this destination.
- forecast point
- New London Harbor · new-london-harbor
- Coordinates
- 41.3440° N, 72.0950° W
Why this sourceResolved live from the destination coordinates, so it represents the selected harbor rather than a nearby city.
Data timingForecast grid updated · 4 hr ago
ConfidenceThe forecast is resolved directly at this location.
Hourly wind, weather, temperature, and precipitation forecast resolved from the selected latitude/longitude.
NWS coastal marine grid
RoleSupplies forecast wave heights, which Boat or Nope uses before buoy-based estimates when available.
- marine grid point
- Block Island · 44097
- Distance
- 49.2 NM from destination
- Coordinates
- 40.9690° N, 71.1270° W
Why this sourceResolved on the coastal marine grid at 44097, the selected marine reference point for this destination.
Data timingMarine grid updated · 2 hr ago
ConfidenceThe source is 49.2 NM away, so local conditions may differ.
Wave-height forecast resolved at marine reference 44097. Used before Boat or Nope's observed-buoy fallback when the grid reports usable wave heights.
NDBC 44097
RoleChecks recent observed wind, waves, and water temperature and helps fill gaps when the marine grid has no usable wave value.
- buoy
- Block Island · 44097
- Distance
- 49.2 NM from destination
- Coordinates
- 40.9690° N, 71.1270° W
Why this sourceSelected from the catalog as the nearest trusted NDBC marine observation station for New London Harbor.
Data timingLatest buoy observation · 37 min ago
ConfidenceThe source is 49.2 NM away, so local conditions may differ.
Selected catalog buoy, 49.2 NM from the selected location. Reports observed wind, waves, and water temperature when those sensors are available.
CO-OPS 8461490
RoleSupplies predicted tide heights and high/low timing for each forecast day.
- tide station
- New London · 8461490
- Distance
- 0.8 NM from destination
- Coordinates
- 41.3550° N, 72.0870° W
Why this sourceSelected as the nearest trusted CO-OPS prediction station for New London Harbor.
Data timingPredictions generated for each selected day
ConfidenceThe selected source is within 25 NM of the destination.
Selected catalog tide station, 0.8 NM from the selected location. Tide predictions and high/low events in feet relative to MLLW for the available forecast days.
AviationWeather KGON
RoleAdds nearby observed and forecast gust context from METAR and TAF reports.
- aviation station
- Groton-New London · KGON
- Distance
- 2.2 NM from destination
- Coordinates
- 41.3300° N, 72.0500° W
Why this sourceChosen from the nearest aviation candidates that returned a current METAR or TAF report.
Data timingLatest METAR observation · 1 hr ago
ConfidenceThe selected source is within 25 NM of the destination.
Nearest aviation candidates: KGON 2.2 NM, KWST 13.3 NM, KMTP 18 NM.
Hourly seas: NWS coastal marine-grid wave height is preferred when available. Gaps fall back to the latest NDBC wave observation projected with forecast wind; fallback values are planning estimates, not NOAA wave forecasts.
Verdict: Go, Caution, No-Go, or Incomplete is derived from the boat limits you select for wind and seas.
Source retrieval15 reused · 6 refreshed
Updated 7/17/2026, 2:02:31 PM EDT · Planning context, not certified navigation.
Local source coverage
Planning a boating day at New London Harbor
A deep harbor at the Thames River mouth with naval, ferry, and commercial traffic.
This harbor in Connecticut uses Block Island (44097) for marine observations, New London (8461490) for tide predictions, and Groton-New London (KGON) for nearby aviation weather context.
This location is part of Boat or Nope's reviewed launch catalog and remains subject to automated source-health checks.Nearby harbors