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Avellanas Rivermouth Surf Forecast
/ Guanacaste (28 surf breaks) /
Surf Forecasts:
Avellanas Rivermouth surfForecast / Guanacaste / Costa Rica
48hr Weather and Surf, issued 11 pm Tuesday 31 Mar 2026 CSTForecast update in hr min s Forecast update imminent
Avellanas Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Avellanas Rivermouth sea temperature is
28.4° C
(Which is normal for this time of year)How big are the waves at Avellanas Rivermouth today?
The current surf forecast for Avellanas Rivermouth at 4AM is: 1.3m 14s primary swell from a South direction and 0.3m 14s secondary swell from a Southwest direction, 0.5m 4s secondary swell from a Northeast direction (forecast issued at 11:00pm March 31). The wind direction is predicted to be onshore.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (01 Apr) | 4ft (1.2m) | 14s |
| Afternoon (01 Apr) | 3.5ft (1.1m) | 13s |
| Evening (01 Apr) | 3.5ft (1.1m) | 13s |
Table - waves today at Avellanas Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 01 | Thursday 02 | Friday 03 | ||||||||||||||||||||||
| 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 20 | 19 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 16 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 801 | 672 | 653 | 541 | 518 | 511 | 423 | 423 | 417 | 340 | 335 | 268 | 395 | 476 | 863 | 1487 | 1447 | 1560 | 1541 | 1541 | 1616 | 1557 | 1557 | 1557 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | on | cross- off | cross- off | cross | cross- on | on | on | cross- on | on | cross- off | cross- off | cross | cross- on | on | cross- on | cross- on | cross- on | off | off | cross- off |
High Tide / height (m) | 2:07AM 2.26 | 2:27PM 2.44 | 2:49AM 2.30 | 3:05PM 2.49 | 3:28AM 2.32 | 3:41PM 2.50 | ||||||||||||||||||
Low Tide / height (m) | 8:00PM 0.35 | 8:13AM 0.33 | 8:43PM 0.26 | 8:53AM 0.30 | 9:22PM 0.20 | 9:30AM 0.29 | ||||||||||||||||||
Wednesday 01 | Thursday 02 | Friday 03 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:39 | - | - | - | - | - | - | - | 5:39 | - | - | - | - | - | - | - | 5:39 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 5:53 | - | - | - | - | - | - | - | 5:52 | - | - | - | - | - | - | - | 5:52 | - |
 | | |  | |  | |  |  | |  | | | |  | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | 1 | - | - | 1 | - | - | - | - | 2 | - | - | - | - | - | - | - | - |
| Temp. °C | 28 | 27 | 27 | 26 | 30 | 31 | 29 | 28 | 28 | 27 | 25 | 25 | 29 | 31 | 29 | 28 | 28 | 27 | 26 | 25 | 29 | 31 | 29 | 28 |
| Feels °C (?) | 27 | 26 | 26 | 26 | 29 | 33 | 30 | 30 | 30 | 30 | 27 | 26 | 30 | 32 | 30 | 30 | 31 | 30 | 28 | 26 | 30 | 32 | 30 | 29 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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