81°
Chance Showers And Thunderstorms
40%
34
St. Mary's County, MD · Patuxent River
Greenwell State Park
25420 Rosedale Manor Ln, Hollywood, MD 20636
A 596-acre working-farm state park with about a mile of Patuxent River shoreline, a small sandy beach, and miles of hiker/biker/equestrian trails. One of the few Maryland parks with on-site therapeutic horseback riding.
Today's Conditions
Skip the beach today.
Thunderstorms · High nettle risk · 40% rain
Full NWS forecast for Today
A chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms between 2pm and 4pm. Mostly cloudy, with a high near 81. East wind 8 to 12 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Tonight
Mostly cloudy, with a low around 70. East wind 6 to 12 mph. New rainfall amounts less than a tenth of an inch possible.
Weather
- 81°F air — ideal beach weather
- 40% rain — rain likely at some point
Water
- 84°F water — warm — full-day swim weather
- High nettle risk — 69% probability — reconsider swimming
Safety
- Thunderstorms — stay off the water when storms approach
28 /100
skip
0 Swim
52 Sunbathe
20 Walk
38 Fish
30 Photo
Best for sunbathing today
Atmosphere
Air Temp
81°F
Mostly Cloudy
Wind
8 to 12 mph
E
Rain
40%
Today
UV Peak
8 Very High
High 11 AM–03 PM · burn in ~25m
Burn-free before 09 AM & after 06 PM
Tomorrow
80°F
Partly Sunny
Water
Water Temp
84°F
Swimming weather
Next Low Tide
7:02 PM
0.1 ft · in 3.8h
Sea Nettles
High nettle risk
69% probability · Gooses Reef buoy
Water Quality
Clean
10 MPN/100mL · Enterococcus
USGS · sampled 10mo ago
Sun & Moon
Sunrise
5:52 AM
Sunset
8:30 PM
Moon · 5%
Waning Crescent
Spring tides — bigger range
7-Day Beach Day Forecast
80°
Partly Sunny
2%
86
85°
Sunny
2%
86
93°
Sunny
1%
75
92°
Sunny
3%
78
90°
Mostly Sunny then Slight Chance Showers And Thunderstorms
15%
44
90°
Mostly Sunny then Slight Chance Showers And Thunderstorms
22%
41
What to Bring Today
- critical SPF 50 sunscreen UV index 8 — very high
- recommended Sturdy umbrella + sand anchor 8 to 12 mph wind
- optional Swimsuit - water is swimmable Water is 84°F
- optional Light cover-up, watch for pop-ups 40% rain chance
Always remember water bottle, trash bag (leave no trace).
Best Fishing Times Today
Solunar theory: fish activity peaks at moon transits (major) and moonrise/moonset (minor). All times local.
Major
10:00 PM - 12:00 AM
Minor
3:00 AM - 4:00 AM
Major
10:30 AM - 12:30 PM
Minor
7:00 PM - 8:00 PM
Beach Info
Parking
Free lot near the Rosedale Manor House; short walk to the water.
Dogs
Leashed dogs welcome on trails and beach year-round.
Entry Fee
Free
Address
25420 Rosedale Manor Ln, Hollywood, MD 20636
Amenities
Frequently Asked
Is it safe to swim at Greenwell State Park today?
Greenwell 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. No lifeguards are on duty, so check the day's conditions and swim with caution. Always review the current advisories, surf, and rip-current notes before getting in the water.
Is Greenwell State Park dog-friendly?
Leashed dogs welcome on trails and beach year-round.
Is there an entry fee at Greenwell State Park?
Entry to Greenwell State Park is free.
Are there lifeguards at Greenwell State Park?
No lifeguards are stationed at Greenwell State Park. Swim at your own risk and keep close watch on children.
What amenities are at Greenwell State Park?
Amenities at Greenwell State Park include beach, trails, picnic area, restrooms, kayak launch, horseback riding.
When is the water warmest at Greenwell State Park?
The Patuxent warms through July to highs around 78-82°F. Best swimming window is late June through early September.
Where is Greenwell State Park located?
Greenwell State Park is in St. Mary's County, MD, at 25420 Rosedale Manor Ln, Hollywood, MD 20636.
Nearby Beaches
Updated · Data from NOAA, NWS