Alkimos Surf Break

Lat Long: 31.68° S 115.68° E

Alkimos Surf Forecast and Surf Report

Issued: 7 am 18 Sep 2026 (local time)

Forecast update in  hr  min

Today's Alkimos sea temperature is
18.2°C
0.5° 

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


Alkimos surf forecast from 18 Sep 2026:

  • Best quality surf: Sunday 20 Sep, 8AM (local time) - 7.5ft (2.3m), 13s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Saturday 19 Sep, 8AM (local time) - 15ft (4.5m), 14s period, W swell with 8,194 kJ wave energy.
  • Next surfable swell (1★+): Sunday 20 Sep, 8AM (local time) - 7.5ft (2.3m), 13s period with WSW swell.

Best Forecast Surf Conditions for Alkimos this week:

The surf forecast for Alkimos over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 20) at 8AM. The primary swell is predicted to be 2.3m and 13s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Alkimos in the next 16 days are 4.5m 14s and forecast to arrive on Saturday (Sep 19) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sun 20th Sep)7.5ft (2.3m) 13s
Best Surf 8AM (Sun 20th Sep)7.5ft (2.3m) 13s
Most Powerful 8AM (Sat 19th Sep)15ft (4.5m) 14s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Fri night. Warm (max 24°C on Fri afternoon, min 14°C on Sun night). Winds decreasing (fresh winds from the WNW on Sat morning, light winds from the SE by Sun morning).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Mon morning, min 13°C on Tue night). Wind will be generally light.

Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
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
0
0
0
0
2
4
2
4
3
0
4
1
0
3
2
0
1
0
0
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
WSW
17
2.4
W
18
3
WNW
9
4.5
W
14
4
WSW
14
1.9
WSW
13
2.2
WSW
12
1.9
WSW
12
2.1
WSW
16
2.3
WSW
15
2.3
WSW
15
2
WSW
15
1.7
WSW
14
1.7
WSW
14
1.9
WSW
14
1.7
WSW
13
1.5
WSW
13
1.5
SW
12
1.4
SW
12
1.4
SW
14
1.4
SW
13
Wave Graph
Metric surfscale
Energy kJ
313
3465
1351
8034
6075
1255
1399
1047
2102
2238
2360
1716
1175
1244
1272
932
760
646
627
754
700
Wind (km/h)
20
N
35
W
35
NW
35
WNW
30
W
15
W
10
SE
15
SSW
5
E
10
WSW
20
SSW
10
SE
20
SSW
25
SSW
20
ESE
10
S
25
S
15
SSW
25
SW
20
SW
5
W
Wind State
cross-off
cross-on
cross-on
cross-on
on
on
cross-off
cross-on
cross-off
on
cross-on
cross-off
cross-on
cross-on
cross-off
cross
cross-on
cross-on
cross-on
on
on
High Tide
00:33AM0.55m
3:21AM0.52m
5:15AM0.53m
6:17AM0.54m
7:06AM0.54m
9:55PM0.35m
7:49AM0.54m
9:34PM0.38m
Low Tide
2:13PM0.12m
2:32PM0.10m
2:49PM0.10m
3:02PM0.10m
3:11PM0.11m
3:15PM0.13m
00:50AM0.33m
3:17PM0.15m
2:07AM0.29m
cloud
part cloud
rain showers
cloud
part cloud
rain showers
rain showers
part cloud
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:11
6:09
6:09
6:07
6:05
6:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:09
6:10
6:10
6:12
6:12
6:13
6:14
 mm
1
1
1
Temp °C
22
24
17
17
17
17
16
18
17
18
17
16
16
17
17
18
17
17
17
16
15
Feels °C
18
19
11
9
9
13
16
16
14
17
14
13
12
13
13
17
14
14
13
11
11
  • 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 Alkimos Surf forecast

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

Are you planning a holiday in Perth City Coast? If you are looking for accommodation near Alkimos, camping, hotels and holiday cottages in Perth City Coast, consider staying in Perth which is 35 km (22 miles) away. Other places in and around Perth City Coast where you can find information about places to rent, and car hire include Fremantle which is 43 km (27 miles) away, Canning Vale, Gosnells and Kwinana.

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