Moonstone Surf Break

Lat Long: 35.57° N 121.11° W

Moonstone Surf Forecast and Surf Report

Issued: 10 am 20 Sep 2026 (local time)

Forecast update in  hr  min

Today's Moonstone sea temperature is
16.2°C
0.4° 

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


Moonstone surf forecast from 20 Sep 2026:

  • Best quality surf: Friday 25 Sep, 11PM (local time) - 10ft (3.0m), 9s period, NW swell with cross-onshore winds.
  • Most powerful swell: Friday 25 Sep, 11PM (local time) - 10ft (3.0m), 9s period, NW swell with 1,359 kJ wave energy.
  • Next surfable swell (1★+): Monday 21 Sep, 8AM (local time) - 3ft (0.9m), 17s period with SW swell.

Best Forecast Surf Conditions for Moonstone this week:

The surf forecast for Moonstone over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 21) at 8AM. The primary swell is predicted to be 0.9m and 17s period with a secondary swell of 1.1m and 7s. Another secondary swell of 1.6m and 7s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Moonstone in the next 16 days are 3.0m 9s and forecast to arrive on Friday (Sep 25) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Mon 21st Sep)3ft (0.9m) 17s
Best Surf11PM (Fri 25th Sep)10ft (3.0m) 9s
Most Powerful11PM (Fri 25th Sep)10ft (3.0m) 9s

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


Short Range Forecast

Mostly dry. Warm (max 20°C on Sun afternoon, min 14°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 23°C on Fri morning, min 17°C on Wed night). Wind will be generally light.

Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Saturday
26
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
2
2
0
2
2
0
2
2
1
3
2
1
2
1
0
3
1
0
1
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
18
0.9
SW
18
0.8
SW
17
0.9
SW
17
0.9
SW
17
0.9
SW
17
0.9
SW
16
0.9
SW
16
0.9
SW
16
1.5
WNW
12
1.5
WNW
11
1.4
WNW
11
1.3
WNW
10
1.2
WNW
11
0.8
SSW
12
1.7
WNW
7
2.3
WNW
8
2.5
NW
9
1.5
WNW
10
1.3
WNW
10
1.1
WNW
10
Wave Graph
Metric surfscale
Energy kJ
379
460
358
465
465
459
362
421
367
625
533
433
327
317
195
274
622
1157
402
339
235
Wind (km/h)
10
WSW
15
WNW
10
NNW
10
W
15
WNW
10
NW
10
W
20
WNW
10
NNW
10
WNW
15
WNW
5
NW
5
SW
10
WNW
5
NE
10
NW
20
WNW
10
NNW
10
WNW
20
WNW
10
NW
Wind State
on
on
cross-on
on
on
cross-on
on
cross-on
cross-on
on
on
glassy
cross-on
on
cross-off
cross-on
cross-on
cross-on
on
cross-on
cross-on
High Tide
8:28AM1.48m
6:08PM1.78m
8:46AM1.53m
7:03PM1.83m
9:04AM1.59m
7:49PM1.88m
9:21AM1.67m
8:32PM1.91m
9:39AM1.75m
9:14PM1.91m
9:59AM1.85m
9:58PM1.87m
10:22AM1.95m
10:44PM1.80m
Low Tide
12:24PM1.33m
1:44AM0.47m
1:18PM1.24m
2:18AM0.43m
2:01PM1.12m
2:48AM0.41m
2:40PM0.99m
3:15AM0.43m
3:18PM0.84m
3:41AM0.48m
3:57PM0.69m
4:08AM0.57m
4:38PM0.55m
4:35AM0.68m
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:50
6:50
6:52
6:52
6:52
6:54
6:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:02
7:00
7:00
6:58
6:57
6:54
 mm
Temp °C
19
20
16
17
18
15
19
20
18
22
22
18
21
21
18
23
23
20
20
21
16
Feels °C
19
19
15
16
16
13
18
19
17
21
21
18
21
20
17
21
20
18
19
20
15
  • 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 Moonstone Surf forecast

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

Moonstone is 39 km (24 miles) from Paso Robles. If you plan a vacation in San Luis Obispo, look for hotels and other accommodation in Paso Robles. Paso Robles has rooms for a wide range of budgets as well as car hire and transport links.

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