Live Weather & Forecast

Weather in Guaynabo

Puerto Rico, United States · Real-time conditions & 3-day outlook

Flag of United States
Partly cloudy
26°C
Feels like 31°C
79°F / Feels 87°F
Partly cloudy
Guaynabo, Puerto Rico
🌞 Daytime
Updated: 2026-04-13 17:15
💧
Humidity
74%
💨
Wind
5 km/h NE
🌬️
Wind Gust
9.9 km/h
🌡️
Pressure
1013 mb
👁️
Visibility
16 km
☀️
UV Index
0.7 (Low)
🌧️
Precipitation
9.49 mm
☁️
Cloud Cover
75%
💦
Dew Point
23.2°C
🌐
Wind Degree
35°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
116.9 μg/m³
NO₂
2.2 μg/m³
O₃
47 μg/m³
SO₂
1.5 μg/m³
PM 2.5
3.8 μg/m³
PM 10
4.5 μg/m³

Weather Alerts 1

Met · Severe · Future
Flood Watch issued April 13 at 3:05AM AST until April 15 at 8:00AM AST by NWS San Juan PR

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Puerto Rico, including the following areas, Central Interior, Culebra, Eastern Interior, Mayaguez and Vicinity, North Central, Northeast, Northwest, Ponce and Vicinity, San Juan and Vicinity, Southeast, Southwest, Vieques and Western Interior and Virgin Islands, including the following areas, St Croix a...

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Effective: 2026-04-13T03:05:00-04:00  ·  Expires: 2026-04-13T15:30:00-04:00

Today's Hourly Forecast

24-hour breakdown for Guaynabo, Puerto Rico

12 AM
Cloudy
23°
Cloudy
💧 92% 💨 8.6 km/h
1 AM
Cloudy
23°
Cloudy
💧 94% 💨 6.8 km/h
2 AM
Cloudy
23°
Cloudy
💧 95% 💨 7.2 km/h
3 AM
Mist
23°
Mist
💧 95% 💨 6.8 km/h
4 AM
Cloudy
23°
Cloudy
💧 95% 💨 5.4 km/h
5 AM
Mist
23°
Mist
💧 97% 💨 3.6 km/h
6 AM
Mist
23°
Mist
💧 97% 💨 4 km/h
7 AM
Mist
24°
Mist
💧 95% 💨 5.4 km/h
8 AM
Partly Cloudy
25°
Partly Cloudy
💧 90% 💨 7.2 km/h
9 AM
Partly Cloudy
26°
Partly Cloudy
💧 79% 💨 9.7 km/h
10 AM
Cloudy
27°
Cloudy
💧 75% 💨 10.1 km/h
11 AM
Moderate or heavy rain shower
27°
Moderate or heavy rain shower
💧 79% 💨 7.9 km/h 🌧️ 100%
12 PM
Cloudy
27°
Cloudy
💧 77% 💨 6.5 km/h
1 PM
Cloudy
26°
Cloudy
💧 75% 💨 5 km/h
2 PM
Moderate or heavy rain shower
26°
Moderate or heavy rain shower
💧 80% 💨 4 km/h 🌧️ 100%
3 PM
Overcast
25°
Overcast
💧 86% 💨 2.9 km/h
4 PM
Overcast
24°
Overcast
💧 88% 💨 4.7 km/h
5 PM
Partly cloudy
26°
Partly cloudy
💧 74% 💨 5 km/h 🌧️ 100%
6 PM
Overcast
24°
Overcast
💧 97% 💨 5.4 km/h
7 PM
Overcast
24°
Overcast
💧 98% 💨 6.8 km/h
8 PM
Torrential rain shower
23°
Torrential rain shower
💧 98% 💨 8.6 km/h 🌧️ 100%
9 PM
Overcast
23°
Overcast
💧 98% 💨 11.9 km/h
10 PM
Overcast
23°
Overcast
💧 97% 💨 14.4 km/h
11 PM
Heavy rain
22°
Heavy rain
💧 96% 💨 12.6 km/h 🌧️ 100%

3-Day Forecast

Daily overview for Guaynabo, Puerto Rico

Today
Heavy rain
Heavy rain
27° / 22°
🌧️ 88% chance of rain
💧 Avg. humidity: 90%
💨 Max wind: 14.4 km/h
🌧️ Total precip: 42.12 mm
☀️ UV Index: 2.4
🌅 Sunrise: 06:09 AM
🌇 Sunset: 06:41 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Moderate rain
Moderate rain
26° / 20°
🌧️ 79% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 9.4 km/h
🌧️ Total precip: 5 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:08 AM
🌇 Sunset: 06:41 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Moderate rain
Moderate rain
29° / 19°
🌧️ 83% chance of rain
💧 Avg. humidity: 85%
💨 Max wind: 14.4 km/h
🌧️ Total precip: 11.07 mm
☀️ UV Index: 2.8
🌅 Sunrise: 06:08 AM
🌇 Sunset: 06:41 PM
🌙 Waning Crescent
🌑 Moon: 8% lit

Best Time to Visit Guaynabo

Plan your trip to Guaynabo, United States around the most favorable weather conditions.

Peak Season
November – April
Dry season — low humidity, clear skies, comfortable temperatures.
Shoulder Season
May, October
Fewer crowds, moderate prices, mild weather.
Off Season
June – September
Wet/monsoon season; heavier rainfall possible.
← Back to Guaynabo 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Guaynabo?
Current conditions in Guaynabo: Partly cloudy, temperature 26°C, humidity 74%.
What is the best time to visit Guaynabo?
The best time to visit Guaynabo is typically November – April. Dry season — low humidity, clear skies, comfortable temperatures.
What is the climate like in Guaynabo?
Guaynabo is located at approximately 18.4° latitude. It has a tropical or subtropical climate with wet and dry seasons.
Does it rain a lot in Guaynabo?
The wettest period in Guaynabo is typically during June – September. Wet/monsoon season; heavier rainfall possible.
What should I pack for a trip to Guaynabo?
For visits to Guaynabo during November – April: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is Guaynabo in?
Guaynabo is located in United States, in the state of Puerto Rico.
What are the public holidays in Guaynabo in 2026?
View the 2026 public holidays for Guaynabo on our Holidays page.
What are the GPS coordinates used for the weather forecast in Guaynabo?
The weather forecast for Guaynabo uses coordinates 18.3579, -66.112.