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Cascais in January: weather, sea & travel advice
This month's data profile
Balanced monthly profile
Cascais in January is climatically mixed. The average daily high is around 15 °C, and the sea is about 15 °C. With about 10 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
44/100 · #12
Warmth
#12
Dryness
#10
Sun
#11
Sea warmth
#10
Published best categories: none
Cascais · JanuaryPhoto: Terry Kearney from liverpool, merseyside · CC0Climate facts
- Average high
- 15 °C
- Average low
- 11 °C
- Sea
- 15 °C
- Rainy days (est.)
- 10 rainy days (est.)
- Sun (est.)
- 3 h/day
- Humidity
- 81 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| December | 16 | 12 | 11 | 84 | 2.5 | 82 | 5.0 | 16 | 45 |
| January (selected) | 15 | 11 | 10 | 69 | 2.9 | 81 | 4.8 | 15 | 44 |
| February | 15 | 11 | 9 | 52 | 4.1 | 80 | 4.8 | 15 | 49 |
How do the previous and next months compare?
Baseline: January (44/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| December | +1 | +0.9 °C | +1 °C | +0.8 | +15.1 mm | -0.4 h | +1.5 % | +0.2 m/s | +0.8 °C |
| February | +5 | +0.3 °C | -0.1 °C | -1.7 | -16.9 mm | +1.2 h | -0.1 % | ±0 m/s | -0.5 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Cascais in January?
The average daily high is around 15 °C, with an average daily low of about 11 °C.
Can you swim in Cascais in January?
The sea is about 15 °C (cold).
Does it rain a lot in Cascais in January?
The curated estimate is about 10 rainy days per month, not a directly measured long-term average. Total precipitation averages around 69 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Cascais?
By the climate score, June, July, August and September are the strongest months for Cascais. For a beach trip: June, July, August and September. January is not among them.