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Avellanas Rivermouth Surf Forecast
/ Guanacaste (28 surf breaks) /
Avellanas Rivermouth surfForecast / Guanacaste / Costa Rica
12 Day Weather and Surf, issued 5 pm Tuesday 29 Apr 2025 CST
Best Forecast Surf Conditions for Avellanas Rivermouth this week:
The surf forecast for Avellanas Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Apr 30) at 6AM. The primary swell is predicted to be 1.1m and 15s period with a secondary swell of 0.6m and 14s. Another secondary swell of 0.2m and 4s is also forecast. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Avellanas Rivermouth in the next 12 days are 1.1m 19s and forecast to arrive on Tuesday (May 06) at 3PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (May 05) at 9AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Wed 30th Apr) | 3.5ft (1.1m) 15s |
| Best Surf | 12PM (Wed 30th Apr) | 3.5ft (1.1m) 15s |
| Most Powerful | 3PM (Tue 6th May) | 3.5ft (1.1m) 19s |
Table - best surf conditions forecast for Avellanas Rivermouth over the next 12 days.
Tue 29 | Wednesday 30 | Thursday 01 | Friday 02 | Saturday 03 | Sunday 04 | Monday 05 | Tuesday 06 | Wednesday 07 | Thursday 08 | Friday 09 | Saturday 10 | Sun 11 | ||||||||||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 16 | 15 | 15 | 15 | 14 | 18 | 18 | 13 | 19 | 14 | 18 | 18 | 16 | 16 | 16 | 18 | 18 | 15 | 20 | 16 | 19 | 19 | 18 | 17 | 17 | 16 | 16 | 16 | 18 | 16 | 16 | 15 | 14 | 14 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 554 | 481 | 543 | 543 | 431 | 432 | 639 | 354 | 450 | 536 | 607 | 444 | 515 | 371 | 471 | 352 | 486 | 503 | 306 | 436 | 507 | 794 | 547 | 1543 | 919 | 376 | 768 | 558 | 929 | 561 | 817 | 627 | 389 | 373 | 198 | 195 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | on | on | cross- off | cross- on | on | cross- off | cross- on | glass | cross- off | cross | cross | cross- off | cross | glass | cross- off | cross | cross- off | cross- off | glass | cross- off | off | cross | glass | cross- off | glass | glass | cross- off | glass | glass | off | glass | cross | cross- off | cross- on | cross- on |
High Tide / height (m) | 3:45PM 2.83 | 4:18AM 2.51 | 4:35PM 2.75 | 5:09AM 2.45 | 5:25PM 2.62 | 6:01AM 2.34 | 6:17PM 2.44 | 6:56AM 2.22 | 7:13PM 2.26 | 7:56AM 2.11 | 8:13PM 2.09 | 9:00AM 2.04 | 9:19PM 1.96 | 10:05AM 2.02 | 10:27PM 1.90 | 11:05AM 2.04 | 11:30PM 1.89 | 11:57AM 2.10 | 12:24AM 1.93 | 12:41PM 2.17 | 1:10AM 1.98 | 1:22PM 2.23 | 1:51AM 2.03 | |||||||||||||
Low Tide / height (m) | 10:08PM -0.12 | 10:20AM 0.07 | 10:57PM -0.07 | 11:11AM 0.16 | 11:48PM 0.05 | 12:04PM 0.30 | 12:40AM 0.20 | 1:01PM 0.45 | 1:37AM 0.36 | 2:04PM 0.60 | 2:37AM 0.50 | 3:13PM 0.70 | 3:40AM 0.60 | 4:23PM 0.73 | 4:42AM 0.65 | 5:26PM 0.70 | 5:37AM 0.66 | 6:20PM 0.62 | 6:25AM 0.64 | 7:05PM 0.53 | 7:08AM 0.61 | 7:45PM 0.44 | 7:48AM 0.56 | |||||||||||||
Tue 29 | Wednesday 30 | Thursday 01 | Friday 02 | Saturday 03 | Sunday 04 | Monday 05 | Tuesday 06 | Wednesday 07 | Thursday 08 | Friday 09 | Saturday 10 | Sun 11 | ||||||||||||||||||||||||
| Sunrise | - | - | 5:26 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:22 | - | - | 5:22 | - | - | 5:22 | - | - | 5:22 | - | - | 5:22 |
| Sunset | 5:53 | - | - | 5:54 | - | - | 5:54 | - | - | 5:54 | - | - | 5:54 | - | - | 5:54 | - | - | 5:54 | - | - | 5:54 | - | - | 5:55 | - | - | 5:55 | - | - | 5:55 | - | - | 5:55 | - | - |
 |  | | |  | |  | | |  | | | | | | | | | |  | | | | | | | | | | | | | | | | | |
Rain (mm) | - | 1 | - | - | 2 | - | 1 | 1 | 1 | - | 2 | 1 | - | 4 | 2 | 2 | 14 | 2 | 1 | - | - | - | 9 | 2 | 4 | - | - | 3 | 15 | 4 | 1 | 6 | - | 1 | 1 | - |
| Temp. °C | 31 | 28 | 31 | 29 | 28 | 31 | 29 | 27 | 30 | 29 | 27 | 29 | 29 | 28 | 29 | 29 | 27 | 28 | 28 | 27 | 29 | 29 | 27 | 29 | 28 | 27 | 29 | 28 | 27 | 29 | 29 | 28 | 30 | 29 | 28 | 31 |
| Feels °C (?) | 34 | 26 | 33 | 30 | 30 | 32 | 31 | 28 | 32 | 30 | 28 | 32 | 30 | 30 | 31 | 31 | 30 | 31 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 30 | 32 | 30 | 30 | 32 | 32 | 32 | 33 | 31 | 31 | 34 |
Short Range Forecast: Light rain (total 6mm), mostly falling on Wed night. Warm (max 31°C on Tue afternoon, min 26°C on Tue night). Winds decreasing (fresh winds from the ENE on Tue night, calm by Fri morning). | Days 3-6 Weather Summary Heavy rain (total 27mm), heaviest during Sun night. Warm (max 29°C on Fri afternoon, min 26°C on Fri night). Wind will be generally light. | Days 6-9 Weather Summary Moderate rain (total 16mm), heaviest on Tue night. Warm (max 29°C on Tue morning, min 26°C on Mon night). Wind will be generally light. | Long Range Forecast: Heavy rain (total 31mm), heaviest during Thu night. Warm (max 31°C on Sun morning, min 26°C on Thu night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Avellanas Rivermouth surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Avellanas Rivermouth Surf forecast
The above surf forecast table for Avellanas Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Avellanas Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Avellanas Rivermouth surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Avellanas Rivermouth) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Avellanas Rivermouth may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Avellanas Rivermouth is 44 km (27 miles) from Nicoya. If you plan a holiday in Guanacaste, look for hotels and other accommodation in Nicoya. Nicoya has rooms for a wide range of budgets as well as car hire and transport links.
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