Shark Alley surfForecast / Great Barrier Island / New Zealand

information circle12 Day Weather and Surf, issued 12 am Saturday 20 Dec 2025 NZDT
Forecast update in hr  min  s Forecast update imminent
Shark Alley surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Shark Alley sea temperature is
20.1° C
(Which is 1.3°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Shark Alley this week:

The surf forecast for Shark Alley over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Dec 21) at 10AM. The primary swell is predicted to be 0.5m and 13s period with a secondary swell of 0.4m and 8s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Shark Alley in the next 12 days are 1.4m 7s and forecast to arrive on Wednesday (Dec 24) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Friday (Dec 26) at 4AM.

Wave TypeTime (NZDT) & Date Wave Height & Period
Next good surf (1 star+)10AM (Sun 21st Dec)1.5ft (0.5m) 13s
Best Surf10AM (Sun 21st Dec)1.5ft (0.5m) 13s
Most Powerful 7PM (Wed 24th Dec)4.5ft (1.4m) 7s

Table - best surf conditions forecast for Shark Alley over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 3mm), mostly falling on Fri night. Warm (max 21°C on Sat afternoon, min 17°C on Sat night). Winds decreasing (fresh winds from the W on Fri night, light winds from the NW by Mon afternoon).

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Mon night. Warm (max 22°C on Wed afternoon, min 18°C on Wed night). Winds decreasing (fresh winds from the NW on Tue night, light winds from the WNW by Thu morning).

Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Fri
26
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
Swell
Height Map
Wave Height (m) & direction (?)
0.4
N
0.5
N
0.5
N
0.5
N
0.5
N
0.5
N
0.5
N
0.5
N
0.5
N
0.5
N
1.1
NW
1.1
NW
1.1
NW
1.2
NNW
1.3
NNW
0.9
NNW
0.4
NNE
0.4
NNE
0.5
N
0.4
NNE
0.4
NNE
Period(s) (?)151414141313131212126675671313131313
Wave
Graph
(?)Metric surfscale
Energy kJ (?)711039797858483747271729111878123825958896867
Wind
(km/h)
35
W
35
W
25
WSW
35
WSW
25
WSW
20
WSW
25
SW
15
W
15
NW
30
WNW
30
NW
25
W
30
WNW
35
NW
15
NW
30
WSW
20
WSW
15
NW
30
W
25
WSW
15
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
offoffoffoffoffcross-
off
crosscross-
off
crosscross-
off
cross-
off
crosscrossoffoffcrosscross-
off
cross-
off
cross-
off
High Tide
/ height (m)
8:26AM
2.07
8:33PM
1.99
9:06AM
2.10
9:15PM
2.01
9:45AM
2.13
9:56PM
2.03
10:26AM
2.14
10:39PM
2.04
11:07AM
2.15
11:23PM
2.05
11:49AM
2.16
12:07AM
2.04
12:32PM
2.15
Low Tide
/ height (m)
1:48AM
0.73
2:19PM
0.75
2:33AM
0.68
3:02PM
0.72
3:16AM
0.63
3:45PM
0.69
3:57AM
0.59
4:28PM
0.67
4:37AM
0.58
5:11PM
0.66
5:17AM
0.59
5:55PM
0.65
5:59AM
0.63
6:41PM
0.65
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Fri
26
Sunrise-5:56--5:56--5:56--5:56--5:56--5:58--5:58-
Sunset--8:34--8:34--8:35--8:35--8:36--8:36--8:36
rain showers
rain showers
clear
part cloud
part cloud
cloud
part cloud
part cloud
light rain
light rain
cloud
light rain
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
Rain (mm)
11------11-2---------
Temp. °C191921181819171720202021212122201820191820
Feels °C (?)141517111415111419171819171722171517151418
  • 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

Latest Updates

submit an eyeball surf report

Quick surf report for Shark Alley:

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 Shark Alley 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.


false

Information about the Shark Alley Surf forecast

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

Shark Alley is 88 km (55 miles) from the city of Northshore. If you plan a holiday in Great Barrier Island, look for hotels and other accommodation in Northshore. Northshore has rooms for a wide range of budgets as well as car hire and transport links.

Nearest locationNearest
Nearest locationNearest
Nearest locationNearest