Expanded-coverage previewThis location uses healthy nearby sources with broader station distances. The exact stations and distances are shown below.
Flat Ground
Not today, captain. The water is outside your comfort line.
Patchy Smoke · 78° · 10 kt windNo 4-hour stretch stays inside the Pursuit 235 limits of 15 kt wind and 2.5 ft seas.
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
9 NWS grid hours
Prediction unavailable
NDBC 44029
NDBC 44029 · observed 7/16/2026, 11:00:00 AM 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.
View exact hourly readings
How this forecast is built
4 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.
NWS hourly forecast
RoleSupplies the hourly wind, sky, temperature, and precipitation forecast at this destination.
- forecast point
- Flat Ground · flat-ground
- Coordinates
- 42.6805° N, 70.5827° W
Why this sourceResolved from the destination coordinates, so it represents the selected harbor rather than a nearby city.
Data timingForecast grid updated · 39 min 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
- Massachusetts Bay · 44029
- Distance
- 9.5 NM from destination
- Coordinates
- 42.5230° N, 70.5660° W
Why this sourceResolved on the coastal marine grid at NDBC 44029, the selected marine reference point for this destination.
Data timingMarine grid updated · 1 hr ago
ConfidenceThe selected source is within 25 NM of the destination.
Wave-height forecast resolved at NDBC 44029. Used before Boat or Nope's observed-buoy fallback when the grid reports usable wave heights.
NDBC 44029
RoleChecks recent observed wind, waves, and water temperature and helps fill gaps when the marine grid has no usable wave value.
- buoy
- Massachusetts Bay · 44029
- Distance
- 9.5 NM from destination
- Coordinates
- 42.5230° N, 70.5660° W
Why this sourceSelected from the catalog as the nearest trusted NDBC marine observation station for Flat Ground.
Data timingLatest buoy observation · 1 hr ago
ConfidenceThe selected source is within 25 NM of the destination.
Nearest catalog buoy, 9.5 NM from the selected location. Reports observed wind, waves, and water temperature when those sensors are available.
CO-OPS 8443970
RoleSupplies predicted tide heights and high/low timing for each forecast day.
- tide station
- Boston · 8443970
- Distance
- 28.5 NM from destination
- Coordinates
- 42.3530° N, 71.0500° W
Why this sourceSelected as the nearest trusted CO-OPS prediction station for Flat Ground.
Data timingPredictions generated for each selected day
ConfidenceThis source did not return usable data during the latest refresh.
Nearest catalog tide station, 28.5 NM from the selected location. Tide predictions and high/low events in feet relative to MLLW for the available forecast days.
CO-OPS today: 403 Forbidden
AviationWeather KLWM
RoleAdds nearby observed and forecast gust context from METAR and TAF reports.
- aviation station
- Lawrence Muni · KLWM
- Distance
- 24 NM from destination
- Coordinates
- 42.7172° N, 71.1234° W
Why this sourceChosen from the nearest aviation candidates that returned a current METAR or TAF report.
Data timingLatest METAR observation · 7 min ago
ConfidenceThe selected source is within 25 NM of the destination.
Nearest aviation candidates: KLWM 24 NM, KPSM 26.1 NM, KBOS 26.7 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.
Updated 7/16/2026, 1:00:41 PM EDT · Planning context, not certified navigation.
Nearby harbors