Puerto Rico San Juan Weather in April — Climate Guide
April in San Juan is very-high
April is very-high for San Juan.
April is San Juan's last fully-dry month before sargassum + summer rain pattern arrives. Daytime 30°C, UV index 11 extreme, sea 27°C swimmable. Sargassum (brown seaweed) statistically minimal in April on north-coast beaches — last clean-beach month for first-time visitors.
Holy Week (early April most years — Mexican + Latin American + Puerto Rican domestic families spike, hotels +30-50%). Post-Easter (Apr 15-30) is the year's best pre-summer value window: dry weather, clean beaches, normal pricing.
Travel score
Last sargassum-free + post-Easter value window
April Weather at a Glance
April averages 86°F / 30°C highs and 72°F / 22°C lows with 7 rainy days and 100mm rainfall. Humidity 75%. UV 11. Sunshine 8 hours. Sea 27°C very warm. Felt temperature 33°C+ midday. Last full month of dry season pattern.
April Travel Advice
Pre-Easter (Apr 1-14) = Spring Break tail + Holy Week prep. Holy Week (varies by year, often mid-April): Latin American domestic peak, hotels +30-50%. Post-Easter (Apr 15-30): year's pre-summer value window. Pre-book summer travel (May-Aug) tours + hotels now. Schedule outdoor 7:00-11:00; AC indoors 12:00-16:00; beach evenings.
Flying In from Overseas
Holy Week drives Latin American + Mexican + PR domestic. US Spring Break tail. European Easter. Direct flights from NYC $400-650, Boston $400-650, Toronto $450-700.
April Pricing Trends
Holy Week premium first half: Condado 4-star $400-700/night. Post-Easter value (Apr 23-30): $250-450 per couple, El Convento $280-500. Summer tours booking deposits $50-100 (Vieques bio bay, El Yunque tours).
San Juan April Weather Stats
Avg High
30°C
Avg Low
22°C
Rainy Days
7
100mm total
Sunshine
8h
Daily avg
Humidity
75%
humid
UV Index
11
Extreme
Wind
19 km/h
Gusts 34
Sea Temp
27°C
swimming-warm
Crowds
Busy
At attractions
April Sunrise & Sunset
Air Quality
PM2.5
15 μg/m³
PM10
28 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
34°C
Nighttime
23°C
Humidity and wind affect how the actual temperature feels.
Wind
19 km/h
Max gust 34 km/h
Activities Recommended for April
April Travel Pros & Cons
Pros
- Last fully-dry + sargassum-free month
- Post-Easter value window (Apr 15-30)
- Summer booking window opens
- Sea 27°C warm
Cons
- Holy Week +30-50% hotel premium
- UV 11 extreme + 30°C heat building
- Spring Break tail through April 14
April Events & Festivals
- Holy Week / Semana Santa (early April most years — Latin American inbound + Mexican-PR families)
- **Post-Easter pricing window (mid-late April) — last dry month before sargassum + rain pattern**
- Whale watching tail (humpback migration through Caribbean)
San Juan in April — Full Picture
April is San Juan's last fully-dry month before sargassum + summer rain pattern arrives. Daytime 30°C, UV index 11 extreme, sea 27°C swimmable. Sargassum (brown seaweed) statistically minimal in April on north-coast beaches — last clean-beach month for first-time visitors.
Holy Week (early April most years — Mexican + Latin American + Puerto Rican domestic families spike, hotels +30-50%). Post-Easter (Apr 15-30) is the year's best pre-summer value window: dry weather, clean beaches, normal pricing.
Last-call month for booking summer (May-Aug) Vieques bio bay tours, El Yunque Recreation.gov reservations (Memorial Day weekend US tourists), and Culebra ferry tickets (high-demand Easter weekend).
What to Wear & What to Pack
Hot dry tail — light tropical, hat, SPF 50+. UV index 11 still extreme. Holy Week (early April some years) modest dress for cultural visits.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current30°C
22°C
7.7/mo
Summer (Jun·Jul·Aug)
32°C
24°C
11.7/mo
Autumn (Sep·Oct·Nov)
31°C
23.3°C
12.3/mo
Winter (Dec·Jan·Feb)
28°C
21°C
8.3/mo
San Juan Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 28° | 21° | 8d·75mm | 7h | 76% | 9 | Very busy | Peak |
| February (Best) | 28° | 21° | 7d·65mm | 8h | 75% | 10 | Very busy | Peak |
| March (Best) | 29° | 21° | 6d·55mm | 8h | 74% | 11 | Very busy | Peak |
| April (Best) | 30° | 22° | 7d·100mm | 8h | 75% | 11 | Busy | Shoulder |
| 31° | 23° | 10d·150mm | 8h | 76% | 12 | Moderate | Shoulder | |
| 32° | 24° | 11d·130mm | 8h | 78% | 12 | Moderate | Shoulder | |
| 32° | 24° | 12d·130mm | 8h | 78% | 12 | Busy | Peak | |
| 32° | 24° | 12d·150mm | 7h | 79% | 11 | Moderate | Shoulder | |
| 32° | 24° | 13d·160mm | 7h | 80% | 10 | Quiet | Low season | |
| 31° | 24° | 13d·165mm | 7h | 80% | 9 | Quiet | Low season | |
| November (Best) | 30° | 22° | 11d·140mm | 7h | 78% | 8 | Moderate | Shoulder |
| December (Best) | 28° | 21° | 10d·110mm | 7h | 77% | 8 | Very busy | Peak |
View Other Months
San Juan April Hotel Picks
Frequently Asked Questions
Is April a good time to visit San Juan?
San Juan in April is very-high. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in San Juan in April?
San Juan April averages a high of 30°C and a low of 22°C.
Does it rain much in San Juan in April?
San Juan April averages 100mm of rainfall over about 7 rainy days.
What should I wear in San Juan in April?
Hot dry tail — light tropical, hat, SPF 50+. UV index 11 still extreme. Holy Week (early April some years) modest dress for cultural visits.
What time are sunrise and sunset in San Juan in April?
San Juan April sunrise is 06:10 and sunset is 18:30, with 12h 20min of daylight.
What's the air quality like in San Juan in April?
San Juan April air quality (AQI) averages 40, rated Good. PM2.5 averages 15μg/m³.
What activities are recommended in San Juan in April?
In April, San Juan is great for Condado Beach (last sargassum-free), Old San Juan morning walks, Vieques bio bay + Sun Bay.
Is April peak season in San Juan?
San Juan April crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit San Juan
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.