Ostional Surf Break

Lat Long: 11.10° N 85.76° W

Ostional Surf Forecast and Surf Report

Issued: 5 am 08 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ostional sea temperature is
29.2° C
0.9° 

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


Ostional surf forecast from 8 Jul 2026:

  • Best quality surf: Saturday 11 Jul, 3AM (local time) - 3ft (0.9m), 15s period, SW swell with offshore winds.
  • Most powerful swell: Wednesday 8 Jul, 9AM (local time) - 3.5ft (1.1m), 16s period, SW swell with 661 kJ wave energy.
  • Next surfable swell (1★+): Saturday 11 Jul, 3AM (local time) - 3ft (0.9m), 15s period with SW swell.

Best Forecast Surf Conditions for Ostional this week:

The surf forecast for Ostional over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 11) at 3AM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 0.6m and 8s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Ostional in the next 16 days are 1.1m 16s and forecast to arrive on Wednesday (Jul 08) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Wednesday (Jul 08) at 9AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sat 11th Jul)3ft (0.9m) 15s
Best Surf 3AM (Sat 11th Jul)3ft (0.9m) 15s
Most Powerful 9AM (Wed 8th Jul)3.5ft (1.1m) 16s

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


Alright folks, Rusty here with a look at what’s on the menu for our little corner of the coast. Let’s get straight into it.

Right now, we’ve got a bit of a flat spell to kick things off. No real surf to speak of for the first couple of days, but the real story starts Wednesday the 8th of July. The ocean’s been holding a solid SW groundswell, with a long 16-second period that’s packing moderate energy (719), so those lines will have some proper push. The issue early on is the wind – a fresh 22 mph breeze from the ENE is keeping things clean and offshore, which is a massive positive, but the swell height is only sitting around 4 ft. It’s not huge, but the quality is there for a wave that’ll reel off nicely. At Ostional (a beach and reef setup), that combination of clean conditions and a long-period SW swell is your best bet for a few fun ones. The water is 85°, which is about average for this time of year, so no surprises there.

Thursday the 9th and Friday the 10th see the swell dropping a touch to 3 ft and 3 ft, still from the SW with a 15-second period. The offshore wind holds, but the energy dips into the low to mid-300s, so it’s a bit weaker. Still surfable, just smaller and maybe a bit inconsistent. Ostional is an inconsistent break, so don’t expect a party wave every set.

Now, the standout. Saturday morning, July 11th. The wind backs off to a much more manageable 12 mph from the ENE, still offshore, and the 3 ft SW swell has a 15-second period. The combined energy is moderate (395), and the forecast is actually calling for good surf conditions. This is the window. The break will be clean, the swell direction is spot-on for the break’s optimum from the SW, and it’s the best combination of size, period, and wind we’ve seen. You’ll have the place to yourself mostly, but just be aware Ostional can get crowded sometimes. The waves won’t be huge, but they’ll be lined up and clean.

After that, Sunday the 12th through to the middle of the following week, the swell drops off to a mix of 2 ft to 3 ft. Wind stays offshore but gets fresh again, up to 22-25 mph. That strong breeze will keep the surface clean, but it’ll be a battle to paddle into the smaller waves. Not really worth the effort for most. The wave energy is weak to moderate in that 230 to 390 range. There’s a brief little window on Thursday the 16th of July, where the wind goes glassy in the afternoon with a 3 ft SW swell, but it’s a quick moment.

Heading into the second week, the swell looks small again, mostly 2 ft to 3 ft from the SW and SSW. Periods vary between 12 and 17 seconds. The wind is often a stiff offshore, which is clean but makes it hard work for the size on offer. Nothing to get excited about until Monday the 20th or Tuesday the 21st, where the energy picks back up to a moderate 475 and 584, but with 2 ft to 3 ft swell and fresh cross-off winds, it’s marginal at best. Worth a look if you’re desperate, but not a standout.

So, if you’re picking your moment, Saturday July 11th morning is the clear winner. Get out there for those clean, 3 ft SW lines with a bit of energy. The rest of the outlook is mostly small and clean but lackluster. The long-period swells aren’t doing us any favors at a beach and reef break that can be inconsistent, but when it lines up, it’s a treat.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Fri night. Warm (max 32°C on Wed afternoon, min 26°C on Thu night). Mainly fresh winds.

Days 4-6 Weather Summary

Moderate rain (total 10mm), heaviest on Sun afternoon. Warm (max 30°C on Mon afternoon, min 25°C on Sat night). Winds increasing (light winds from the E on Sat night, strong winds from the ENE by Mon morning).

Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
2
0
1
1
1
1
1
2
1
1
1
1
2
0
1
2
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SW
16
1.1
SW
16
1
SW
16
0.9
SW
15
0.9
SW
15
0.8
SW
15
0.8
SW
15
0.8
SW
15
0.9
SW
15
0.9
SW
15
0.9
SW
15
0.9
SW
14
0.9
SW
14
0.6
SSW
14
0.6
SW
12
0.7
SW
14
0.9
SW
14
0.6
SW
13
0.7
SW
13
0.7
SW
13
0.7
SW
13
Wave Graph
Metric surfscale
Energy kJ
661
567
483
395
344
262
258
262
340
340
326
297
301
138
122
186
264
140
178
180
178
Wind (km/h)
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
35
ENE
30
ENE
30
ENE
20
ENE
20
ENE
20
ENE
25
ENE
30
ENE
15
ENE
40
ENE
35
ENE
25
ENE
35
ENE
35
NE
30
ENE
Wind State
off
cross-off
off
off
off
off
off
off
off
off
cross-off
cross-off
off
off
off
off
off
off
off
off
off
High Tide
8:38PM1.93m
9:09AM2.29m
9:40PM1.91m
10:10AM2.32m
10:48PM1.93m
11:14AM2.38m
11:56PM2.01m
12:19PM2.45m
1:00AM2.13m
1:20PM2.54m
2:00AM2.28m
2:18PM2.61m
2:56AM2.42m
Low Tide
2:40PM0.58m
2:41AM0.56m
3:40PM0.55m
3:41AM0.56m
4:45PM0.48m
4:48AM0.53m
5:50PM0.39m
5:55AM0.46m
6:52PM0.26m
7:01AM0.37m
7:49PM0.14m
8:02AM0.27m
8:43PM0.04m
clear
clear
clear
clear
clear
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thunderstorm
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thunderstorm
thunderstorm
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thunderstorm
cloud
part cloud
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thunderstorm
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:24
5:26
5:26
5:26
5:26
5:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:09
6:09
6:09
6:09
6:09
6:09
6:09
 mm
1
2
2
3
3
1
Temp °C
31
32
28
30
31
27
28
29
27
28
28
26
27
28
26
29
30
26
30
28
26
Feels °C
30
31
27
28
30
26
27
29
26
29
29
28
27
28
26
26
28
26
28
26
24
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Ostional Surf forecast

The above surf forecast table for Ostional provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ostional can be found by selecting the local surf guide option on the grey menu. Our Ostional 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 (Ostional) 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 Ostional 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.

Ostional is 21 km (13 miles) from San Juan del Sur. If you plan a holiday in Rivas Province, look for hotels and other accommodation in San Juan del Sur. San Juan del Sur has rooms for a wide range of budgets as well as car hire and transport links.

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