Puerto Rico
San Juan in October: weather, sea & travel advice
This month's data profile
Rain shapes the decision
San Juan in October is climatically mixed. The average daily high is around 29 °C, and the sea is about 29 °C. With about 26 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
54/100 · #10
Warmth
#5
Dryness
#10
Sun
#9
Sea warmth
#2
Published best categories: none
San Juan · OctoberPhoto: Ktorrespr · CC BY-SA 4.0Climate facts
- Average high
- 29 °C
- Average low
- 26 °C
- Sea
- 29 °C
- Rainy days (est.)
- 26 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 80 %
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 | 30 | 27 | 27 | 178 | 6.8 | 80 | 3.5 | 29 | 52 |
| October (selected) | 29 | 26 | 26 | 171 | 6.1 | 80 | 3.3 | 29 | 54 |
| November | 28 | 25 | 23 | 155 | 5.4 | 81 | 3.7 | 28 | 58 |
How do the previous and next months compare?
Baseline: October (54/100)
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 | -2 | +0.6 °C | +0.4 °C | +1.7 | +7.3 mm | +0.7 h | -0.6 % | +0.2 m/s | ±0 °C |
| November | +4 | -1.1 °C | -0.9 °C | -2.6 | -15.5 mm | -0.7 h | +0.5 % | +0.4 m/s | -0.6 °C |
All twelve months in context
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Where to stay in San Juan
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Useful next decisions
Frequently asked questions
How warm is San Juan in October?
The average daily high is around 29 °C, with an average daily low of about 26 °C.
Can you swim in San Juan in October?
The sea is about 29 °C (very warm).
Does it rain a lot in San Juan in October?
The curated estimate is about 26 rainy days per month, not a directly measured long-term average. Total precipitation averages around 171 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit San Juan?
By the climate score, January, February, March and April are the strongest months for San Juan. For a beach trip: January, February, March and April. October is not among them.