New England, United States
    Haddam Island State Park

    Brownstone Exploration and Discovery Park

    Best months: Jul–Sep

    Protected Area

    Haddam Island State Park

    Why dive here

    With 35+ marine species recorded in the area - including nurse sharks - Brownstone Exploration and Discovery Park offers some of New England's richest diving. Water ranges 4-19°C, warmest July, August, September.

    Best timeJul–Sep
    WetsuitA 5mm wetsuit
    Marine lifeNurse Sharks · 35+ species recorded
    Water4-19°C · warmest July, August, September

    Brownstone is a flooded quarry, a spot we've found ourselves at more than once for a quick local dive. It’s pretty straightforward, a freshwater site with various sunken objects scattered around for navigation and exploration. Think old boats, aircraft parts, and even some vehicles. Visibility can vary, but it's a solid choice for skill practice or just getting some bottom time in New England without a long drive.

    Safety Notes

    Cold water this month (avg 15°C). Drysuit or thick wetsuit (7mm+) recommended.

    Today05:5817:1911h 21m daylightGolden hour 16:42

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    Conditions

    Ocean conditions, forecast and tides for Brownstone Exploration and Discovery Park

    Brownstone Exploration and Discovery Park Ocean Conditions

    Monthly averages for Brownstone Exploration and Discovery Park, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (42.6, -70.6) (0km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    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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