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Live · updated 9:50p

Old Sump

Green light.

Wind and seas stay inside your 15 kt wind and 2.5 ft seas limits from now through 1:50 AM tomorrow, covering your full 4-hour outing.

TodayBOAT4 kt N · 0.0 ft
Best windowOpen now

How the day develops

Judged against ≤ 15 kt and ≤ 2.5 ft

Now · 9:50pWind4kt N · g5Seas0.0ftTideLow tide 3:19 AM
your limit
Observed
now

Seven-day outlook

The week ahead

Flags past day 3 are a read, not a call

todayBOAT

4 kt · 0.0 ft

Open now
tomorrowBOAT

6 kt · 0.0 ft

Saturday, 12–4 AM
next dayBOAT

5 kt · 0.0 ft

Sunday, 12–4 AM
monBOAT

6 kt · 0.0 ft

Monday, 12–4 AM
tueBOATRead

8 kt · 0.0 ft

Tuesday, 12–4 AM
wedBOATRead

4 kt · 0.0 ft

Wednesday, 12–4 AM
thuBOATRead

8 kt · 0.0 ft

Thursday, 12–4 AM

Tides & water

Tide chartLynn, Lynn Harbor8443187Water temperatureCastle Island (NOS) 8444069CSIM3

Sources & stations

Where this call comes from

We never hide the station. If a source is stale or missing, the flag says Incomplete instead of guessing.

Boat or Nope's preview for Old Sump in Massachusetts uses nearby public marine forecast, tide, and local-weather sources for trip planning.

forecastOld Sump · old-sumpForecast grid updatedofficial alertsOld Sump · old-sumpAlert feed updatedwave forecastCastle Island (NOS) 8444069 · CSIM3Marine grid updatedobservedCastle Island (NOS) 8444069 · CSIM3Latest buoy observationpredictionLynn, Lynn Harbor · 8443187Predictions generated for each selected dayobserved water levelLynn, Lynn Harbor · 8443187Incompletecurrent predictionLynn Harbor (Depth 10ft) · ACT0951Seven-day current predictionobserved + forecastBeverly Muni · KBVYLatest METAR observation

Nearby

If not here, maybe there

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Boston Harbor8.9 mi · Massachusetts
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Hingham Harbor15 mi · Massachusetts
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Gloucester Harbor16 mi · Massachusetts
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Scituate Harbor20 mi · Massachusetts
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