Month guide · Castro Marim, Portugal
Castro Marim in October: weather and what to expect
In October, Castro Marim averages highs of 24°C and lows of 16°C, with about 7 rainy days and 62 mm of rain. Highs are 5°C cooler than in September and 5°C warmer than in November. Our rules rate it good for walking and cycling. Crowds in the Algarve are medium.
Is October a good time to visit?
Good for
- Walking and cyclingHighs of 24°C with about 7 rainy days
Not ideal for
Nothing stands out as a weaker fit.
Daily highs through October
Town-level · ERA5-Land 1991-2020Highs fall about 5°C over the month. A day above 30°C happens in roughly 1 October in 3; nights below 10°C in about 1 in 6.
October in detail
Town-level · ERA5-LandCrowds, holidays and daylight
Public holidays in October 2027
- 5 Oct Republic Day
Local (municipal) holidays are not included.
Warmer in October
Where is warm in October →| Place | High | Rain days | From Castro Marim |
|---|---|---|---|
| Mértola, Alentejo | 24°C | 7 | 51 km |
The nearest towns with a warmer October. Distances are in a straight line.
How October is changing
Town-level · ERA5-LandOctober highs are 2.2°C warmer than in 1991-2000, and October rainfall is down about 15% (2016-2025 against 1991-2000). Days above 30°C in October went from 0.1 to 3.7 a year on average.
Questions about Castro Marim in October
Is October a good time to visit Castro Marim?
Our rules rate October good for walking and cycling (highs of 24°C with about 7 rainy days).
How warm is Castro Marim in October?
Average highs are 24°C and lows 16°C. September averages 29°C and November 19°C.
Does it rain much in Castro Marim in October?
About 7 days have at least 1 mm of rain, with 62 mm in total over the month.
Is Castro Marim busy in October?
In October 2025, nights booked through online platforms in the Algarve were about 35% of the busiest month, which we count as medium. The figure is for the whole region and leaves out hotels.
How long are the days in Castro Marim in October?
About 11 h 18 min from sunrise to sunset in the middle of the month.
Sources
Climate: ERA5-Land, Copernicus Climate Change Service (C3S) Climate Data Store, contains modified Copernicus information (CC BY 4.0). Crowds: Eurostat, nights spent in short-stay accommodation booked through online platforms (tour_ce_omn12) (CC BY 4.0). Place names and populations: GeoNames (CC BY 4.0). Climate averages cover 1991-2020. Daylight: calculated from the town's coordinates. Full methodology