A beach day on Guatemala’s Pacific coast turns on three things this page puts in one table per beach: how hot it will feel, how strong the sun is, and when the storms are likely to arrive. The three beaches are El Paredón and Sipacate (both listed under Sipacate, Escuintla, in OpenStreetMap) and Monterrico (listed under Taxisco, Santa Rosa). El Paredón and Monterrico are about 64 km apart (computed from those coordinates), so each gets its own forecast.
Surf, swell and tides are not here: INSIVUMEH’s wave warnings, its tide products and, when available, a wave and swell forecast are on the Pacific marine forecast.
The beach-day tables
Pulled Sep 25, 2026 at 12:43 Guatemala time from MET Norway and OpenWeather.
Weather data provided by OpenWeather
Data from MET Norway (CC BY 4.0); processed by us
Powered by WeatherAPI.comEl Paredón
| Day | Feels-like high | Air high | UV index max | Rain chance 6am–noon | Noon–6pm | First step ≥50% rain chance | First thunder in MET's symbols |
|---|---|---|---|---|---|---|---|
| Fri Sep 25 | 37°C (99°F) | 30°C (86°F) | 10.3 (very high to extreme) | — | 92% | 3 PM step | none |
| Sat Sep 26 | 37°C (99°F) | 30°C (86°F) | 10.2 (very high to extreme) | 100% | 92% | 6 AM step | none |
| Sun Sep 27 | 32°C (90°F) | 28°C (82°F) | 11.3 (very high to extreme) | 92% | 100% | 6 AM step | none |
| Mon Sep 28 | 34°C (93°F) | 29°C (84°F) | no UV forecast | 20% | 69% | 3 PM step | none |
| Tue Sep 29 | 34°C (93°F) | 29°C (84°F) | no UV forecast | 0% | 55% | 3 PM step | none |
Point 13.9176, -91.0746 (OpenStreetMap).
Monterrico
| Day | Feels-like high | Air high | UV index max | Rain chance 6am–noon | Noon–6pm | First step ≥50% rain chance | First thunder in MET's symbols |
|---|---|---|---|---|---|---|---|
| Fri Sep 25 | 36°C (97°F) | 30°C (86°F) | 12 (very high to extreme) | — | 91% | 3 PM step | none |
| Sat Sep 26 | 36°C (97°F) | 30°C (86°F) | 8.4 (very high to extreme) | 75% | 100% | 6 AM step | none |
| Sun Sep 27 | 34°C (93°F) | 29°C (84°F) | 10.4 (very high to extreme) | 38% | 100% | noon step | none |
| Mon Sep 28 | 34°C (93°F) | 29°C (84°F) | no UV forecast | 20% | 62% | noon step | none |
| Tue Sep 29 | 35°C (95°F) | 30°C (86°F) | no UV forecast | 0% | 74% | noon step | none |
Point 13.8911, -90.4814 (OpenStreetMap).
Sipacate
| Day | Feels-like high | Air high | UV index max | Rain chance 6am–noon | Noon–6pm | First step ≥50% rain chance | First thunder in MET's symbols |
|---|---|---|---|---|---|---|---|
| Fri Sep 25 | 38°C (100°F) | 31°C (88°F) | 10.6 (very high to extreme) | — | 97% | 3 PM step | none |
| Sat Sep 26 | 37°C (99°F) | 30°C (86°F) | 8 (very high to extreme) | 100% | 91% | 6 AM step | none |
| Sun Sep 27 | 33°C (91°F) | 28°C (82°F) | 10.6 (very high to extreme) | 86% | 100% | 6 AM step | none |
| Mon Sep 28 | 34°C (93°F) | 29°C (84°F) | no UV forecast | 20% | 75% | 3 PM step | none |
| Tue Sep 29 | 35°C (95°F) | 29°C (84°F) | no UV forecast | 20% | 65% | noon step | none |
Point 13.9302, -91.1472 (OpenStreetMap).
Feels-like and air high: OpenWeather, the highest of its 3-hour steps that day; OpenWeather says its feels-like accounts for the human perception of weather. UV: WeatherAPI.com's daily UV index (its free forecast covers 3 days); bands follow the U.S. EPA scale (1–2 low, 3–7 moderate to high, 8+ very high to extreme), applied to the value rounded to a whole number. Rain chance: OpenWeather's 3-hour steps. Thunder: the first period from 6 AM whose MET Norway weather symbol names thunder. No sea temperature: none of our free sources provides it. A model, not a measurement; hours are Guatemala time.
How to read them. Feels-like high is the highest of OpenWeather’s 3-hour-step feels-like values that day. UV index max is the day’s forecast peak with its EPA band: WeatherAPI.com’s UV index when that source is connected, otherwise MET Norway’s clear-sky UV, marked with an asterisk, which assumes no cloud. First step ≥50% is the first OpenWeather step from 6 AM whose rain chance reaches 50 percent; first thunder is the first period from 6 AM whose MET Norway weather symbol names thunder; shaded rows are days with one. There is no sea-temperature column: none of our free sources provides one.
Sun, heat and storms: what the sources say
- UV. The EPA’s UV Index scale puts 3 to 7 at moderate to high (protection needed; seek shade during late morning through mid-afternoon) and 8 and above at very high to extreme (extra protection needed). It also gives a shadow rule: if your shadow is shorter than you are, around midday, you are being exposed to higher levels of UV radiation.
- Heat. OpenWeather describes its feels-like figure as accounting for the human perception of weather; the air-temperature column next to it shows the difference for each day.
- Storms. Thunder in a forecast symbol comes from the forecast, not from a lightning sensor. For official warnings see weather alerts today; for tropical storms, the hurricane tracker.
Getting there and what to do
- Antigua to El Paredón and Antigua to Monterrico.
- Surf lessons and board rental: El Paredón surf.
- Month-by-month rain for Monterrico: the best time to visit Guatemala, month by month.
- Sunset times: sunrise and sunset times in Guatemala.
Sources
Forecast: OpenWeather’s 5-day, 3-hour forecast (feels-like, air temperature, rain chance), MET Norway’s locationforecast (thunder symbols, clear-sky UV) and WeatherAPI.com (UV index, when connected), read daily for the OpenStreetMap coordinates of El Paredón (13.9176, -91.0746), Monterrico (13.8911, -90.4814) and Sipacate (13.9302, -91.1472). UV bands and advice: the U.S. Environmental Protection Agency’s UV Index Scale.
Frequently Asked Questions
How hot does it feel at El Paredón and Monterrico?
The first column of each table is the day’s highest feels-like temperature from OpenWeather, which describes its feels-like figure as accounting for the human perception of weather; the air temperature sits next to it for comparison. Both are forecasts for the beach towns’ coordinates.
How strong is the sun on the Pacific beaches?
Each table shows a forecast maximum UV index for the day and its band on the U.S. EPA scale: 1 to 2 low, 3 to 7 moderate to high, 8 and above very high to extreme. For 8 and above the EPA’s advice includes seeking shade and applying SPF 15 or higher broad-spectrum sunscreen. Values marked with an asterisk are MET Norway’s clear-sky UV, the index if the sky were cloudless, so on a cloudy day the real UV is lower.
What time do the storms start on the Pacific beaches?
The tables give, for each day, the first 3-hour forecast step whose rain chance reaches 50 percent and the first period in which MET Norway’s weather symbol names thunder. They change day to day, which is why the page shows each day rather than a rule.
Where is the surf and swell forecast?
On our Pacific marine forecast page, which carries INSIVUMEH’s wave warnings for the coast and, when available, a wave and swell forecast. This page is about the day on the sand: heat, sun and storms.
