85°
Sunny
0%
76
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
Ideal for a beach walk.
82°F water · 85°F air
Full NWS forecast for This Afternoon
Sunny, with a high near 85. South wind around 14 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 75. South wind 12 to 15 mph, with gusts as high as 25 mph.
Weather
- 85°F air — ideal beach weather
- Sunny skies — clear conditions
Water
- 82°F water — warm — full-day swim weather
- Moderate nettle risk — 59% probability — expect some stings
76 /100
great
72 Swim
78 Sunbathe
85 Walk
71 Fish
80 Photo
Best for walking today
Water level 0.5 ft above predicted
Observed water level is running higher than the astronomical tide prediction. Expect a narrower beach, faster-rising water, and stronger near-shore currents than the tide chart suggests.
Atmosphere
Air Temp
85°F
Sunny
Wind
14 mph
S
Rain
0%
This Afternoon
UV Peak
7 High
High 12 PM–03 PM · burn in ~29m
Burn-free before 10 AM & after 05 PM
Tomorrow
89°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
Water
Water Temp
82°F
Swimming weather
Next Low Tide
7:44 PM
0.3 ft · in 27m
Sea Nettles
Moderate nettle risk
59% probability · Gooses Reef buoy
Sun & Moon
Sunrise
6:42 AM
Sunset
7:24 PM
Moon · 5%
Waning Crescent
Spring tides — bigger range
Tides
| Time | Type | Height |
|---|---|---|
| 1:11 AM | High | 1.8 ft |
| 7:36 AM | Low | 0.6 ft |
| 1:14 PM | High | 1.7 ft |
| 7:44 PM | Low | 0.3 ft |
| Time | Type | Height |
|---|---|---|
| 1:57 AM | High | 1.8 ft |
| 8:22 AM | Low | 0.5 ft |
| 2:07 PM | High | 1.8 ft |
| 8:35 PM | Low | 0.4 ft |
| Time | Type | Height |
|---|---|---|
| 2:41 AM | High | 1.8 ft |
| 9:05 AM | Low | 0.4 ft |
| 2:58 PM | High | 1.8 ft |
| 9:24 PM | Low | 0.4 ft |
| Time | Type | Height |
|---|---|---|
| 3:23 AM | High | 1.8 ft |
| 9:47 AM | Low | 0.4 ft |
| 3:47 PM | High | 1.8 ft |
| 10:11 PM | Low | 0.5 ft |
| Time | Type | Height |
|---|---|---|
| 4:05 AM | High | 1.7 ft |
| 10:29 AM | Low | 0.4 ft |
| 4:34 PM | High | 1.8 ft |
| 10:58 PM | Low | 0.5 ft |
| Time | Type | Height |
|---|---|---|
| 4:46 AM | High | 1.7 ft |
| 11:11 AM | Low | 0.4 ft |
| 5:21 PM | High | 1.7 ft |
| 11:46 PM | Low | 0.6 ft |
| Time | Type | Height |
|---|---|---|
| 5:29 AM | High | 1.6 ft |
| 11:54 AM | Low | 0.4 ft |
| 6:08 PM | High | 1.7 ft |
High/low predictions from NOAA station 8577330, refreshed on every build. Times shown local.
7-Day Beach Day Forecast
89°
Mostly Sunny then Slight Chance Showers And Thunderstorms
18%
37
80°
Chance Rain Showers then Partly Sunny
50%
64
81°
Showers And Thunderstorms Likely
61%
20
84°
Chance Showers And Thunderstorms
53%
24
84°
Mostly Sunny
5%
81
84°
Mostly Sunny
7%
81
What to Bring Today
- recommended SPF 30 sunscreen UV index 7 — high
- recommended Sturdy umbrella + sand anchor 14 mph wind
- optional Swimsuit - water is swimmable Water is 82°F
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
10:40 PM - 12:40 AM
Minor
4:30 AM - 5:30 AM
Major
10:50 AM - 12:50 PM
Minor
6:20 PM - 7:20 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