Middlesex County, CT · Atlantic Ocean

Hammonasset Beach State Park

Connecticut's largest shoreline state park — 2 miles of Long Island Sound beach in Madison. Calmer sound water (not open Atlantic), nature center, camping, and bike paths through coastal forest. The default CT beach day from anywhere along the I-95 corridor.

Today's Conditions

Decent day for photography.

91% rain · 76°F air · 71°F water

Full NWS forecast for This Afternoon

Patchy smoke and showers and thunderstorms before 5pm, then a chance of showers and thunderstorms. Cloudy. High near 76, with temperatures falling to around 72 in the afternoon. South wind around 13 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

A chance of showers and thunderstorms before 8pm, then showers and thunderstorms between 8pm and 11pm, then a chance of showers and thunderstorms between 11pm and 2am. Mostly cloudy. Low around 68, with temperatures rising to around 70 overnight. Southwest wind 7 to 12 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Weather

76°F air — ideal beach weather
91% rain — wet day — beach day is off

Water

71°F water — swimmable, refreshing

36 /100

45 Swim

20 Sunbathe

28 Walk

60 Photo

Best for photography today

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Atmosphere

Air Temp

76°F

Fog/Mist

Wind

13 mph

Rain

91%

This Afternoon

UV Peak

4 Moderate

Peaks 12 PM · burn in ~50m

Burn-free before 11 AM & after 02 PM

Tomorrow

81°F

Sunny

Water

Water Temp

71°F

Refreshing

Next Low Tide

9:28 PM

0.3 ft · in 27m

Water Quality

Clean

10 MPN/100mL · Enterococcus

USGS · sampled 10mo ago

Rip Current Risk · Regional Reference

No zone-specific NWS forecast for this beach (ANZ331)

The OKX office's Surf Zone Forecast doesn't cover this beach's forecast zone directly. Nearby coastal zones it does cover are listed below — regional reference only, not a substitute for the conditions at this specific beach.

NYZ075 Kings (Brooklyn) — Coney Island Beach and Manhattan Beach High
NYZ178 Southern Queens — Jacob Riis Park and Rockaway Beach High
NYZ179 Southern Nassau — Atlantic Beach, Long Beach, Lido Beach, High
NYZ080 Southwestern Suffolk — Gilgo State Park and Robert Moses State Park High
NYZ081 Southeastern Suffolk — Smith Point, Cupsogue Beach, High

NWS SRF · OKX · Issued Jul 18, 6:50 AM

Sun & Moon

Sunrise

5:32 AM

Sunset

8:20 PM

Moon · 18%

Waxing Crescent

Neap tides — smaller range

Tides

Time	Type	Height
2:42 AM	High	6.9 ft
9:00 AM	Low	-0.1 ft
3:13 PM	High	7.0 ft
9:28 PM	Low	0.3 ft

Time	Type	Height
3:35 AM	High	6.5 ft
9:49 AM	Low	0.2 ft
4:04 PM	High	6.9 ft
10:23 PM	Low	0.5 ft

Time	Type	Height
4:27 AM	High	6.1 ft
10:38 AM	Low	0.6 ft
4:54 PM	High	6.8 ft
11:18 PM	Low	0.7 ft

Time	Type	Height
5:21 AM	High	5.8 ft
11:29 AM	Low	0.9 ft
5:46 PM	High	6.6 ft

Time	Type	Height
12:14 AM	Low	0.8 ft
6:17 AM	High	5.6 ft
12:22 PM	Low	1.1 ft
6:39 PM	High	6.5 ft

Time	Type	Height
1:10 AM	Low	0.9 ft
7:14 AM	High	5.4 ft
1:16 PM	Low	1.3 ft
7:32 PM	High	6.4 ft

Time	Type	Height
2:04 AM	Low	0.9 ft
8:09 AM	High	5.4 ft
2:09 PM	Low	1.4 ft
8:25 PM	High	6.3 ft

High/low predictions from NOAA station 8465705, refreshed on every build. Times shown local.

7-Day Beach Day Forecast

Today Jul 18

76°

Patchy Smoke

91%

Sun Jul 19

81°

Sunny

Mon Jul 20

79°

Sunny

Tue Jul 21

80°

Mostly Cloudy then Showers And Thunderstorms Likely

60%

Wed Jul 22

79°

Showers And Thunderstorms

92%

Thu Jul 23

78°

Slight Chance Rain Showers

24%

Fri Jul 24

78°

Slight Chance Rain Showers

15%

What to Bring Today

recommended Sturdy umbrella + sand anchor 13 mph wind
recommended Rain cover + dry bag 91% chance of rain

Always remember water bottle, trash bag (leave no trace).

Beach Info

Parking

Large lots; entry fee in season.

Dogs

Dogs prohibited on the swimming beach Apr 1 – Sept 30; leashed permitted Sept 30 – Apr 1. Leashed allowed in picnic areas year-round; campground allows pets after Columbus Day until May 1. Max 7-ft leash.

Entry Fee

Free with CT plates via Passport to the Parks. Out-of-state vehicles $15–$22 in season; $7 after 4 PM.

Address

1288 Boston Post Rd, Madison, CT 06443

Amenities

lifeguardsrestroomsshowerssnack barcampgroundnature centerbike paths

Frequently Asked

Is it safe to swim at Hammonasset Beach State Park today?

Hammonasset Beach State Park shows a live water-quality reading (bacteria levels) and today's swim-safety score at the top of this page, refreshed on every update. Seasonal lifeguards patrol the swim area in summer — follow their flags. Always review the current advisories, surf, and rip-current notes before getting in the water.

Is Hammonasset Beach State Park dog-friendly?

Is there an entry fee at Hammonasset Beach State Park?

Entry to Hammonasset Beach State Park is free.

Are there lifeguards at Hammonasset Beach State Park?

Yes. Seasonal lifeguards patrol Hammonasset Beach State Park during the summer swim season (typically Memorial Day through Labor Day). Outside that window, swim at your own risk.

What amenities are at Hammonasset Beach State Park?

Amenities at Hammonasset Beach State Park include lifeguards, restrooms, showers, snack bar, campground, nature center, bike paths.

When is the water warmest at Hammonasset Beach State Park?

Atlantic water temperatures peak in August. Northern beaches (ME, NH, MA) run cool — typically 60-68°F at the summer peak. Mid-Atlantic (NJ, DE, MD, VA) hits 74-76°F. The Carolinas and Florida Atlantic warm into the 80s and stay swimmable from May through October.

Where is Hammonasset Beach State Park located?

Hammonasset Beach State Park is in Middlesex County, CT, at 1288 Boston Post Rd, Madison, CT 06443.