Avellanas Rivermouth Surf Break

Avellanas Rivermouth Surf Forecast and Surf Report

Lat Long: 10.24° N 85.84° W

Issued: 5 am 01 Jul 2026 (local time)

Forecast update in  hr  min

Today's Avellanas Rivermouth sea temperature is
30.1° C

1.8°C warmer than normal for this time of year

Avellanas Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Avellanas Rivermouth surf forecast from 1 Jul 2026:

  • Best quality surf: Monday 6 Jul, 3PM (local time) - 3.5ft (1.0m), 20s period, SW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 7 Jul, 6PM (local time) - 5ft (1.5m), 18s period, SW swell with 1,351 kJ wave energy.
  • Next surfable swell (1★+): Thursday 2 Jul, 6PM (local time) - 3ft (0.9m), 15s period with SW swell.

Best Forecast Surf Conditions for Avellanas Rivermouth this week:

The surf forecast for Avellanas Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 02) at 6PM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 0.8m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Avellanas Rivermouth in the next 16 days are 1.5m 18s and forecast to arrive on Tuesday (Jul 07) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Thu 2nd Jul)3ft (0.9m) 15s
Best Surf 3PM (Mon 6th Jul)3.5ft (1.0m) 20s
Most Powerful 6PM (Tue 7th Jul)5ft (1.5m) 18s

Table - best surf conditions forecast for Avellanas Rivermouth over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Some drizzle, heaviest during Thu night. Warm (max 32°C on Wed morning, min 25°C on Fri night). Winds decreasing (fresh winds from the ENE on Wed morning, light winds from the ENE by Thu afternoon).

Days 4-6 Weather Summary

Heavy rain (total 48mm), heaviest during Sat night. Warm (max 31°C on Sat morning, min 24°C on Sat night). Wind will be generally light.

Wednesday
1
Thursday
2
Friday
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
1
0
0
0
0
1
3
1
3
3
2
1
4
3
1
4
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SW
16
0.9
SW
16
1
SW
16
0.9
SW
16
0.9
SW
15
0.9
SSW
15
0.9
SW
14
0.8
SSW
16
0.8
SSW
16
0.8
SSW
16
0.8
SSW
15
0.8
SSW
15
0.9
SW
18
0.9
SW
16
1
SW
16
0.9
SW
16
1
SW
20
1
SW
19
1.2
SW
18
1.4
SW
18
1.5
SW
17
Wave Graph
Metric surfscale
Energy kJ
318
381
502
358
322
382
301
359
324
333
308
284
449
381
502
408
746
730
915
1263
1275
Wind (km/h)
30
ENE
20
E
25
ENE
20
ENE
15
ENE
20
ENE
25
ENE
20
ENE
15
ENE
15
ENE
15
SW
15
E
5
E
5
SSE
10
ENE
15
ENE
10
SW
5
ENE
20
ENE
10
WSW
15
NE
Wind State
cross-on
on
cross-on
cross-on
cross-on
on
cross-on
on
on
on
cross-off
on
glassy
glassy
cross-on
on
cross-off
on
cross-on
cross-off
cross-on
High Tide
3:42PM2.27m
4:17AM2.12m
4:20PM2.26m
4:55AM2.16m
4:58PM2.23m
5:32AM2.18m
5:36PM2.18m
6:09AM2.21m
6:14PM2.12m
6:46AM2.23m
6:56PM2.05m
7:28AM2.25m
7:43PM1.99m
Low Tide
9:33AM0.55m
10:04PM0.31m
10:13AM0.54m
10:40PM0.32m
10:53AM0.55m
11:15PM0.34m
11:32AM0.57m
11:50PM0.38m
12:13PM0.58m
00:25AM0.43m
12:56PM0.59m
1:04AM0.47m
1:44PM0.59m
1:48AM0.52m
clear
clear
clear
part cloud
part cloud
thunderstorm
part cloud
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
thunderstorm
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:26
5:26
5:26
5:26
5:26
5:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:07
6:07
6:07
6:08
6:08
6:08
 mm
1
2
36
2
7
1
Temp °C
32
32
28
30
32
27
31
31
27
31
28
27
28
27
26
30
29
27
31
29
27
Feels °C
31
34
29
32
34
28
31
32
29
34
31
31
32
31
29
34
32
32
35
32
31
Swell 1
Height (m)
Direction
Period (s)
0.8
SW
16
0.9
SW
16
1
SW
16
0.9
SW
16
0.9
SW
15
0.9
SSW
15
0.9
S
10
0.8
S
10
0.9
S
10
0.9
S
11
0.8
S
10
0.8
S
11
0.9
SW
18
0.9
SW
16
1
SW
16
0.9
SW
16
1
SW
16
1
SW
19
1.2
SW
18
1.4
SW
18
1.5
SW
17
Energy kJ
318
381
502
358
322
382
172
133
153
184
133
143
449
381
502
362
471
730
915
1263
1275
Swell 2
Height (m)
Direction
Period (s)
0.7
S
18
0.7
S
10
0.8
S
10
0.7
S
10
0.8
S
11
0.8
S
10
0.9
SW
14
0.8
SSW
16
0.8
SSW
16
0.8
SSW
16
0.8
SSW
15
0.8
SSW
15
0.8
S
10
0.7
S
10
0.7
S
10
0.8
S
9
1
SW
20
0.9
SW
14
0.9
SW
14
0.6
S
9
0.8
S
12
Energy kJ
304
89
118
90
149
136
301
359
324
333
308
284
127
96
89
104
746
346
301
55
177
Swell 3
Height (m)
Direction
Period (s)
0.7
S
9
0.6
S
16
0.6
S
16
0.6
SSW
15
0.5
S
18
0.7
SSW
18
0.7
SSW
16
0.6
SW
14
0.6
SW
14
0.5
SW
14
0.5
SW
13
0.6
SW
18
0.6
SSW
14
0.6
S
14
0.7
SW
21
0.7
SW
20
0.6
S
9
0.6
S
9
0.6
S
9
0.5
N
5
0.2
S
14
Energy kJ
85
195
186
176
167
329
273
162
162
96
84
255
163
134
467
408
56
55
53
11
16
Wind waves
Height (m)
Direction
Period (s)
0.9
NNE
4
0.4
NNE
5
0.7
NNE
4
0.4
N
5
0.4
NE
3
0.5
N
5
0.4
NNE
3
0.5
N
5
0.6
N
6
Energy kJ
35
9
11
7
3
11
4
11
21
Nearest Offshore or Glassy
Rating
(10 max)
3
3
2
3
3
2
3
3
3
2
2
3
3
3
2
3
3
4
4
4
4
Distance (km)
19
10
1
19
19
1
1
19
1
1
1
0
1
1
1
1
1
0
1
1
0
Best forecast wave conditions in Guanacaste
Rating
(10 max)
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
Best forecast wave conditions in Costa Rica
Rating
(10 max)
3
4
3
4
4
3
3
4
3
3
4
3
3
3
3
3
3
4
4
4
4
Header Global
Rating
(10 max)
5
5
8
7
5
7
5
6
5
5
5
5
9
7
6
7
9
7
5
9
9
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Avellanas Rivermouth:

join our community of surf reporters

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 16 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.

Nearest locationNearest