San Carlos, Sonora is one of Mexico’s most underrated coastal destinations — where the Sonoran Desert meets the Sea of Cortez. But depending on when you go, your trip can feel completely different. The best time to visit San Carlos Sonora depends on what you love most — warm water, calm weather, or peaceful beaches.
Sunsets are legendary in San Carlos — especially in fall.
San Carlos Weather Overview
San Carlos enjoys a desert–coastal climate with more than 300 sunny days per year. Expect warm, dry winters and hot, humid summers.
- Average temperatures: 18°C (64°F) in winter to 35°C (95°F) in summer
- Rainy season: July through September (brief afternoon storms)
- Sea temperature: 20–30°C (68–86°F)
- High season: November to April (popular with snowbirds)
Month-by-Month Guide
January – March: Whale Watching & Mild Days
Expect clear skies and comfortable days averaging 22–25°C (low 70s°F). The water is cooler but excellent for whale watching and photography.
April – June: Perfect for Snorkeling & Beach Days
Warm, calm waters (24–28°C / 75–82°F) make this the best time for snorkeling and diving. Semana Santa brings festive beach vibes — book early!
July – September: Hot, Humid & Vibrant
Expect daytime highs over 35°C (95°F). Great for diving and marine life, but plan activities early or late in the day to beat the heat.
October – December: Best Sunsets & Fewer Crowds
Temperatures drop to 25–30°C (77–86°F) and the water stays warm. A favorite season among locals and photographers. The pickleball courts get busier.
San Carlos monthly rainfall and temperature
San Carlos monthly water temperatures
Best Time by Activity
| Activity | Best Months | Conditions |
|---|---|---|
| Swimming & beach relaxation | April – June, Oct – Nov | Warm water, gentle surf |
| Snorkeling & scuba diving | May – September | Warm, clear water |
| Whale watching | January – March | Peak migration season |
| Fishing tournaments | May, October | Sportfishing season |
| Pickleball | October – May | There’s an active pickleball community all year in San Carlos. In the summer, we play mostly in the evenings (all 14 courts have lights). November through April the courts are active from 7am through the evening. |
| Hiking Cerro Tetakawi | November – March | Cooler mornings |
| Kayaking & paddleboarding | April – June | Calm seas |
Crowd Levels & Prices by Season
- High Season (Nov–Apr): Ideal weather but higher prices.
- Shoulder Season (May–Jun / Oct): Best mix of sunshine and affordability.
- Low Season (Jul–Sep): Hotter, quieter, and cheaper.
Seasonal Events & Festivals
- Semana Santa (Easter Week): Lively beach celebration.
- Fishing Tournaments: Usually May & October.
- Pickleball Tournaments: October – March with some smaller tournaments in the summer.
- Whale Watching Season: January – March.
- Local Art Fairs: Held in Marina Plaza in winter.
Local Tips for Planning
- Book hotels 3–4 months ahead for holidays and winter months.
- Use reef-safe sunscreen to protect local marine life.
- Start hikes early morning in summer.
- In rainy months, plan water activities early in the day.
Related Reading
- Driving to San Carlos, Sonora
- Weather in San Carlos, Sonora
- Best Beaches in San Carlos Sonora
- Fishing Tournaments & Events
Summary: The Sweet Spot
For perfect weather and warm water without the crowds, visit San Carlos Sonora from April to early June or October to mid-November. You’ll enjoy calm seas, sunshine, and unforgettable sunsets on the Sea of Cortez.
Summer is a great time to get in or on the water.
