Water temperature in San Marcos today
This is a climate-model estimate, not a measurement: we have no measured water temperature for rivers, lakes and reservoirs yet. Real measurements are available for seas only.
Bite in San Marcos today — moderate 🎣
Pressure is steady, water +25° — most active: salmon and cod. Forecast by fish species and for the week ahead.
Bite forecast →
Water bodies in San Marcos 🌊
Map of water bodies in San Marcos
Water temperature in San Marcos for a month
There is no exact monthly water forecast — the reference is the climate normal: in summer the water warms to about +21°. The monthly normal is below.
Monthly water temperature in San Marcos 🗓️
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| +12 | +12 | +11 | +13 | +14 | +18 | +20 | +21 | +22 | +20 | +16 | +12 |
Climate normal (model estimate).
Water temperature archive in San Marcos on this day
| Year | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|
| Water | +29° | +29° | +28° | +28° | +29° | +30° | +30° | +29° | +28° | +28° |
Climate normal (model estimate for this date), not a measurement archive.
When to swim in San Marcos 🏖️
Where else to swim nearby 🏝️
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FAQ about water in San Marcos ❓
What is the water temperature in San Marcos now?
Now +28° — Warm water.
When to swim in San Marcos?
Comfortable season — from June to October.
When is the water in San Marcos warmest?
Warmest in September — up to +22°.
What bodies of water are there in San Marcos?
Pacific Ocean.
Water temperature in San Marcos — in detail
A summary page of water temperature across all bodies of water in San Marcos: Pacific Ocean. Now about +28°. For seas the temperature is measured SST; for rivers and lakes it is a climate estimate.