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Month guide · Castro Marim, Portugal

Castro Marim in March: weather and what to expect

In March, Castro Marim is one of the ten warmest towns in Portugal. March highs in Castro Marim are now 0.9°C cooler than in 1991-2000. In March, Castro Marim averages highs of 19°C and lows of 11°C, with about 6 rainy days and 44 mm of rain. Our rules rate it good for walking and cycling. Crowds in the Algarve are low.

Based on 1991-2020 climate data · Updated 1 November 2026 · Sources

Average high Town-level19°CLow 11°C
Sea temperature Modelled16°COpen sea nearby, average for the month
Rainy days Town-level644 mm in total
UV index Modelled5Moderate at noon on a clear day
Crowds RegionalLowThe Algarve as a whole

Is March a good time to visit?

Good for

  • Walking and cycling
    Highs of 19°C with about 6 rainy days

Not ideal for

Nothing stands out as a weaker fit.

Daily highs through March

Town-level · ERA5-Land 1991-2020
Usual range (8 in 10 years)Typical high

Highs climb about 2°C over the month. A day above 25°C happens in roughly 1 March in 3.

March in detail

Town-level · ERA5-Land
MeasureFebruaryMarchApril
Average high17°C19°C21°C
Average low9°C11°C12°C
Rainy days (at least 1 mm)567
Total rainfall38 mm44 mm45 mm
Daylight (mid-month)10 h 48 min11 h 54 min13 h 07 min

Crowds, holidays and daylight

Visitor level RegionalLowNights booked through online platforms in the Algarve in March 2025: about 20% of the busiest month.

Public holidays in March 2027

  • 26 Mar Good Friday
  • 28 Mar Easter Sunday

Local (municipal) holidays are not included.

Daylight mid-month Exact11 h 54 minSunrise to sunset, calculated from the town's coordinates.

Warmer in March

Where is warm in March →
PlaceHighRain daysFrom Castro Marim
Mértola, Alentejo20°C751 km

The nearest towns with a warmer March. Distances are in a straight line.

How March is changing

Town-level · ERA5-Land

March highs are 0.9°C cooler than in 1991-2000, and March rainfall is up about 75% (2016-2025 against 1991-2000). Days above 20°C in March went from 17 to 11 a year on average.

Questions about Castro Marim in March

Is March a good time to visit Castro Marim?

Our rules rate March good for walking and cycling (highs of 19°C with about 6 rainy days).

How warm is Castro Marim in March?

Average highs are 19°C and lows 11°C. February averages 17°C and April 21°C.

Does it rain much in Castro Marim in March?

About 6 days have at least 1 mm of rain, with 44 mm in total over the month.

Is Castro Marim busy in March?

In March 2025, nights booked through online platforms in the Algarve were about 20% of the busiest month, which we count as low. The figure is for the whole region and leaves out hotels.

How long are the days in Castro Marim in March?

About 11 h 54 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