Mount Tamalpais

Today’s Forecast:

Today’s Report:

About Mount Tamalpais

Mount Tamalpais is an outdoor-planning page for Mount Tamalpais State Park and upper Marin watershed. It has a distinct purpose centered on elevation changes, marine-layer differences, ridge wind, and trail access, with the forecast used to choose the safest and most comfortable version of the day.

Make the Most of a Mount Tamalpais Day

Start by comparing conditions across Pantoll, East Peak, and the rest of the coverage area. Choose among hiking, biking, camping based on wind, precipitation, temperature, visibility, water or trail conditions, road access, smoke, and available daylight.

Weather Tips for Mount Tamalpais

• Conditions around Mount Tamalpais State Park and upper Marin watershed can differ sharply from nearby towns; elevation changes, marine-layer differences, ridge wind, and trail access are the main planning variables.
• For camping, confirm overnight lows, wind, precipitation, fire restrictions, campground access, and how quickly shelter or services can be reached.
• Recent rain, heat, smoke, fire restrictions, water levels, and afternoon wind can change which route or activity is most comfortable.
• Air quality and wildfire smoke can shift quickly; shorten strenuous plans when visibility or breathing conditions worsen.

Nearby Towns and Areas

This page covers Mount Tamalpais State Park and upper Marin watershed. It can also be useful when planning outdoor time near:

• Pantoll
• East Peak
• Bootjack
• Steep Ravine
• Stinson Beach
• Alpine Lake
• Mill Valley

Plan Around the Conditions

Use the forecast to choose the best version of Mount Tamalpais rather than forcing one itinerary. A shorter route, earlier launch, sheltered shoreline, lower-elevation trail, or town-based backup can preserve the day when conditions change.

7-Day Forecast for Mount Tamalpais

Mount Tamalpais Weather by Season

Winter

At Mount Tamalpais, winter rain can make forest and ridge trails muddy or slick, while wind and fog reduce visibility on exposed roads. Strong systems may bring downed limbs, drainage issues, and temporary trail closures.

Spring

Around Mount Tamalpais State Park and upper Marin watershed, spring is green and often excellent for hiking and biking between showers. Fog can sit below sunny ridges, but late rain and saturated trail surfaces still require flexible route choices.

Summer

For elevation changes, marine-layer differences, ridge wind, and trail access, marine layer keeps some slopes cool while inland ridges heat rapidly above the fog. Afternoon wind, dry vegetation, crowds, and fire restrictions become increasingly important.

Fall

Near Pantoll and the surrounding area, early fall can be warm and clear, but offshore wind and wildfire risk may close trails or roads. The first rain can improve fire conditions while making steep paths slick.

Key Climate Data Points

• Warmest months: August through October on sunnier ridges.
• Coolest months: December through February.
• Wettest season: November through March.
• Driest season: July through September.
• Best outdoor window: Spring and early fall for ridge hikes, biking, and camping.