Portugal
Cascais in October: weather, sea & travel advice
This month's data profile
Clear transition month
Cascais in October is climatically well suited to city breaks and active holidays and hiking. The average daily high is around 21 °C, and the sea is about 18 °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
66/100 · #6
Warmth
#5
Dryness
#9
Sun
#8
Sea warmth
#3
Published best categories: none
Cascais · OctoberPhoto: Terry Kearney from liverpool, merseyside · CC0Climate facts
- Average high
- 21 °C
- Average low
- 17 °C
- Sea
- 18 °C
- Rainy days (est.)
- 10 rainy days (est.)
- Sun (est.)
- 5 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 |
|---|---|---|---|---|---|---|---|---|---|
| September | 22 | 18 | 5 | 28 | 6.6 | 81 | 4.0 | 19 | 81 |
| October (selected) | 21 | 17 | 10 | 76 | 4.5 | 81 | 4.2 | 18 | 66 |
| November | 18 | 14 | 12 | 87 | 3.1 | 81 | 4.8 | 17 | 52 |
How do the previous and next months compare?
Baseline: October (66/100)
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 | |
|---|---|---|---|---|---|---|---|---|---|
| September | +15 | +1.8 °C | +1.3 °C | -5.2 | -48.3 mm | +2.1 h | -0.5 % | -0.2 m/s | +0.5 °C |
| November | -14 | -2.9 °C | -2.6 °C | +1.3 | +10.6 mm | -1.4 h | -0.8 % | +0.6 m/s | -1 °C |
All twelve months in context
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Frequently asked questions
How warm is Cascais in October?
The average daily high is around 21 °C, with an average daily low of about 17 °C.
Can you swim in Cascais in October?
The sea is about 18 °C (refreshing).
Does it rain a lot in Cascais in October?
The curated estimate is about 10 rainy days per month, not a directly measured long-term average. Total precipitation averages around 76 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. October is not among them.