Greenport Jetty
Protected Area
Mashomack
Why dive here
With 35+ marine species recorded in the area - including nurse sharks - Greenport Jetty offers some of New England's richest reef diving. Water ranges 4-19°C, warmest July, August, September.
Greenport Jetty is a straightforward New England shore dive, decent for a casual afternoon exploring the calmer waters. You'll likely spot cunner, tautog, and flounder navigating the rocks, and maybe even a few lobsters tucked into crevices. It's a good spot for newer divers getting comfortable with temperate water, or experienced divers looking for an easy entry to practice skills. Visibility averages 5-10 meters on a good day, but it can drop after heavy rain.
Safety Notes
Cold water this month (avg 15°C). Drysuit or thick wetsuit (7mm+) recommended.
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Conditions
Ocean conditions, forecast and tides for Greenport Jetty
Greenport Jetty Ocean Conditions
Monthly averages for Greenport Jetty, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (42.6, -70.6) (0km away)
October Averages
Sea Temperature
15°C
59°F · Range: 12.8–18.1°C
Air Temperature
10°C
50°F
Wind Speed
3.78 m/s
7.3 knots
Atmospheric Pressure
1017 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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