Is Muir Beach good for swimming today?
Muir Beach has BeachFinder Score: 65/100. Use this as a planning signal only, then check local flags, lifeguards, closures and current beach conditions.
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Muir Beach
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Quick answer
Quick answer: Muir Beach today
Muir Beach is a BeachFinder spot in US-W, US. Today, compare water temperature 17°C, wind 2 km/h · SW, uv 7.3, waves 1.3 m, water quality Check official advisories before leaving. BeachFinder Score: 65/100. Always check official flags, closures and lifeguard advice before swimming.
Water temperature
17°C
Wind
2 km/h · SW
UV
7.3
Waves
1.3 m
Water quality
Check official advisories
Last updated: Aug 27, 07:15 AM local forecast timeBeachFinder Score: 65/100
Sources: Open-Meteo weather and marine forecasts, OpenStreetMap place context and BeachFinder spot data.
This is planning information, not a safety clearance. Conditions can change quickly.
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Live conditions on the site
Surfers can check wind, wave height, currents and surf cues here before opening the full BeachFinder app.
Updated: Aug 27, 07:15 AM
Water temp
17°C
Air temp
14°C
Feels like
14°C
UV index
7.3
Wind
2 km/h · SW
Gust 10 km/h
Waves
1.3 m
Current
1 km/h · N
Parking
...
Shower
...
Accessible access
...
Toilets
...
Restaurants
...
Weather and marine data: Open-Meteo
Muir Beach
Muir Beach extends along the coast of Marin County, Northern California, about 25 kilometers north of San Francisco. Nestled in a protected Pacific cove, this beach is part of a rugged coastline where sandstone cliffs and rocky outcrops dominate, interspersed with small sandy bays. The area remains largely wild, with inland areas covered by chaparral and sparse coastal forest, far from the dense urbanization of the bay. The beach itself forms a narrow crescent of fine sand, framed by massive rocks that plunge directly into the cold waters of the Pacific. Its character remains very distinct from its immediate neighbors: Slide Ranch North Beach, 2.7 kilometers to the north, offers easier access and tourist facilities, while Tennessee Beach, 3 kilometers to the south, attracts more coastal hikers. Muir Beach retains a more secluded atmosphere, with a gentle slope towards the water and direct exposure to open ocean swells. Visitors discover an atmosphere of coastal tranquility, where the constant surf and salty spray dominate the sensory experience. No services are present on site. The beach is not supervised and does not have the Blue Flag label. Access is mainly on foot via coastal trails from adjacent lands, which naturally limits crowds. Swimming conditions remain demanding due to coastal currents and water temperature, typical of the Northern California Pacific.
About this spot
The name 'Muir' honors John Muir, the Scottish-American naturalist and writer who explored and documented California's wild landscapes in the 19th century. Although Muir primarily worked in the Sierra Nevada, his legacy of defending intact coastal lands hangs over this Marin County coastline. The beach itself was formed by the continuous erosion of sandstone cliffs, a process that continues to shape the coast. During winter storms, waves break with remarkable power, reshaping the sand profile and reminding visitors of the raw power of the North Pacific.
Updated 5/9/2026
Frequently asked questions
What is the water temperature at Muir Beach today?
17°C. Marine temperature is shown when forecast coverage is available for this location.
How windy is Muir Beach today?
2 km/h · SW. Wind can change comfort and surface conditions, especially on exposed beaches.
What should I check before swimming at Muir Beach?
Check official safety flags, lifeguard advice, closures, water-quality advisories, UV, wind, waves and currents before entering the water.
Before you go
Conditions
Compare water temperature, air temperature, feels-like temperature, UV index, wind, waves and currents. Surf-focused data appears when a marine model covers the spot.
Amenities
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Muir Beach
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