Month guide · Castro Marim, Portugal
Castro Marim in April: weather and what to expect
April is the first month of the year with average highs above 20°C in Castro Marim. In April, Castro Marim is one of the ten warmest towns in Portugal. In April, Castro Marim averages highs of 21°C and lows of 12°C, with about 7 rainy days and 45 mm of rain. Our rules rate it good for walking and cycling. Crowds in the Algarve are medium.
Is April a good time to visit?
Good for
- Walking and cyclingHighs of 21°C with about 7 rainy days
Not ideal for
Nothing stands out as a weaker fit.
Daily highs through April
Town-level · ERA5-Land 1991-2020Highs climb about 3°C over the month.
April in detail
Town-level · ERA5-LandCrowds, holidays and daylight
Public holidays in April 2027
- 25 Apr Freedom Day
Local (municipal) holidays are not included.
Warmer in April
Where is warm in April →| Place | High | Rain days | From Castro Marim |
|---|---|---|---|
| Mértola, Alentejo | 22°C | 8 | 51 km |
The nearest towns with a warmer April. Distances are in a straight line.
How April is changing
Town-level · ERA5-LandApril highs are 0.6°C warmer than in 1991-2000, and April rainfall is up about 15% (2016-2025 against 1991-2000). Days above 25°C in April went from 4.7 to 5.4 a year on average.
Questions about Castro Marim in April
Is April a good time to visit Castro Marim?
Our rules rate April good for walking and cycling (highs of 21°C with about 7 rainy days).
How warm is Castro Marim in April?
Average highs are 21°C and lows 12°C. March averages 19°C and May 25°C.
Does it rain much in Castro Marim in April?
About 7 days have at least 1 mm of rain, with 45 mm in total over the month.
Is Castro Marim busy in April?
In April 2025, nights booked through online platforms in the Algarve were about 40% 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 April?
About 13 h 07 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