Shag Rock surfForecast / Auckland / New Zealand

information circle12 Day Weather and Surf, issued 12 pm Sunday 21 Dec 2025 NZDT
Forecast update in hr  min  s Forecast update imminent
Shag Rock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Shag Rock sea temperature is
20.6° C
(Which is 2.3°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Shag Rock this week:

The surf forecast for Shag Rock over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Dec 26) at 10PM. The primary swell is predicted to be 3.0m and 15s period. The wind is predicted to be onshore as the swell arrives.

The most powerful waves expected at Shag Rock in the next 12 days are 3.5m 14s and forecast to arrive on Saturday (Dec 27) at 1PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (NZDT) & Date Wave Height & Period
Next good surf (1 star+)10PM (Fri 26th Dec)10ft (3.0m) 15s
Best Surf10PM (Fri 26th Dec)10ft (3.0m) 15s
Most Powerful 1PM (Sat 27th Dec)11ft (3.5m) 14s

Table - best surf conditions forecast for Shag Rock over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 22°C on Tue afternoon, min 16°C on Sun night). Winds increasing (light winds from the WSW on Sun night, fresh winds from the NW by Tue afternoon).

Days 3-6 Weather Summary Moderate rain (total 18mm), heaviest on Fri afternoon. Warm (max 21°C on Fri morning, min 16°C on Wed night). Winds decreasing (fresh winds from the WNW on Wed morning, light winds from the WSW by Wed night).

Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
1
2
1
0
0
0
0
0
0
1
2
3
2
2
0
3
0
0
!
!
Swell
Height Map
Wave Height (m) & direction (?)
2.3
SW
2.1
SW
1.9
SW
1.6
SW
1.3
SW
1.1
SW
1.6
WNW
2.5
W
3
W
2.4
W
2.2
W
2.2
WSW
1.8
WSW
1.2
WSW
1.4
WSW
1.7
WSW
2.5
WSW
3
WSW
3
WSW
3.5
WSW
3
WSW
Period(s) (?)13121211111167910911101817161514141312
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1764123410075894222491606811331104873210866768541068141529373644407038022472
Wind
(km/h)
20
SW
20
WSW
15
SW
10
W
20
W
15
NW
30
NW
35
NW
30
NW
30
WNW
15
SW
10
WSW
10
WSW
10
WSW
10
NW
20
NNW
20
NNW
25
WNW
25
W
20
WSW
10
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
cross-
on
cross-
on
ononcross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
onononcross-
on
cross-
on
crossonononcross-
on
High Tide
/ height (m)
11:15AM
2.68
11:29PM
2.53
11:52AM
2.70
12:07AM
2.52
12:29PM
2.69
12:45AM
2.50
1:07PM
2.67
1:25AM
2.46
1:47PM
2.63
2:09AM
2.41
2:30PM
2.58
2:57AM
2.36
3:18PM
2.53
3:53AM
2.33
Low Tide
/ height (m)
5:27PM
0.43
5:38AM
0.33
6:06PM
0.41
6:15AM
0.34
6:45PM
0.40
6:54AM
0.36
7:25PM
0.41
7:35AM
0.41
8:08PM
0.43
8:19AM
0.47
8:55PM
0.45
9:09AM
0.54
9:47PM
0.47
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunrise5:58--5:58--5:58--6:00--6:01--6:01--6:01--
Sunset-8:39--8:40--8:40--8:42--8:42--8:42--8:43-
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
part cloud
cloud
light rain
rain showers
clear
part cloud
part cloud
clear
light rain
mod rain
rain showers
rain showers
clear
rain showers
Rain (mm)
---------42----1832-1
Temp. °C181816181919202220201917202017211817181816
Feels °C (?)141413161619171817171816191917181614131413
  • 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 Shag Rock Surf forecast

The above surf forecast table for Shag Rock provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Shag Rock can be found by selecting the local surf guide option on the grey menu. Our Shag Rock 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 (Shag Rock) 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 Shag Rock 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.

Shag Rock is 10 km (6 miles) from the city of Waitakere. If you plan a holiday in Auckland, look for hotels and other accommodation in Waitakere. Waitakere has rooms for a wide range of budgets as well as car hire and transport links.

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