Surf Forecasts:
Ruby Bay surf forecast from 20 Jul 2026:
- Most powerful swell: Friday 24 Jul, 12PM (local time) - 4ft (1.2m), 7s period, N swell with 131 kJ wave energy.
Best Forecast Surf Conditions for Ruby Bay this week:
The most powerful waves expected at Ruby Bay in the next 16 days are 1.2m 7s and forecast to arrive on Friday (Jul 24) at 12PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 7s period and expected on Friday (Jul 24) at 12PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12PM (Fri 24th Jul) | 4ft (1.2m) 7s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the 16-day window for our little corner of the world.
Well, I’m not gonna lie to you, it’s a pretty grim picture. The forecast shows a long stretch of nothing happening. We’re looking at a solid gap of flat days right from the start. For the first week and a half, the ocean is basically taking a nap. There’s a tiny bit of energy on the 20th and 21st of July, but with a swell height of 0.3 ft and a combined energy of just 2, it’s not even worth paddling out for. You’d be sitting on a lake.
The only real blip of hope, and I mean *blip*, comes on Friday the 24th of July in the afternoon. We finally see a bit of life with a 4 ft swell from the north, but the period is a short 7 seconds, so it’s going to be a weak, choppy affair. The combined energy is a moderate 114. Still, the glassy wind in the morning could make that afternoon session a little cleaner for a beginner, if you’re desperate. It’s a point break, but it’s a beginner spot that rarely breaks, so it’s not a reliable bet.
Honestly, after that, it’s back to the doldrums. There’s a tiny pulse of 0.3 ft to 4 ft swell on the 29th and 30th of July, but the energy is weak and the directions are all over the place. The water temperature is sitting at 53°F, which is a bit colder than normal for this time of year, so you’ll want a thick wetsuit.
The rest of the 16 days, right up to the 4th of August, is a flat-out blank. It’s a rare spell for this sheltered spot, but it happens. Keep your board in the car and your eyes on the forecast, because it tends not to stay this poor for long.
Rusty.
Short Range ForecastMostly dry. Very mild (max 13°C on Tue afternoon, min 6°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 25mm), heaviest during Fri morning. Very mild (max 12°C on Thu afternoon, min 5°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | N 11 | N 11 | N 11 | N 11 | N 11 | N 10 | N 16 | N 9 | N 8 | N 7 | NW 4 | NW 5 | N 6 | N 7 | N 8 | NNW 15 | NNW 7 | N 8 | NNW 14 | NW 14 | NNW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2 | 2 | 2 | 2 | 2 | 2 | 5 | 2 | 1 | 1 | 13 | 69 | 0 | 131 | 0 | 0 | 0 | 90 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | glassy | glassy | off | off | on | glassy | glassy | glassy | glassy | off | off | off | off | on | off | off | off | off |
High Tide | 2:17PM3.79m | 2:36AM3.76m | 2:59PM3.61m | 3:23AM3.56m | 3:44PM3.43m | 4:16AM3.37m | 4:38PM3.29m | 5:17AM3.23m | 5:49PM3.22m | 6:24AM3.16m | 7:15PM3.28m | 7:30AM3.18m | 8:20PM3.44m | ||||||||
Low Tide | 7:57PM1.16m | 8:33AM1.25m | 8:41PM1.39m | 9:23AM1.45m | 9:39PM1.61m | 10:19AM1.60m | 10:59PM1.76m | 11:20AM1.69m | 00:16AM1.78m | 12:23PM1.71m | 1:19AM1.70m | 1:26PM1.67m | 2:11AM1.58m | ||||||||
 |  |  | | | | | | |  | |  |  | | | |  | | | |  | |
 | 7:46 | — | — | 7:45 | — | — | 7:43 | — | — | 7:43 | — | — | 7:43 | — | — | 7:41 | — | — | 7:41 | — | — |
 | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:24 | — | — | 5:25 | — | — | 5:27 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 10 | 2 | 2 | — | 6 | 4 | — | — | — |
Temp °C | 10 | 11 | 8 | 11 | 13 | 7 | 12 | 12 | 8 | 11 | 12 | 10 | 11 | 11 | 7 | 8 | 8 | 7 | 10 | 10 | 3 |
Feels °C | 9 | 9 | 6 | 10 | 11 | 4 | 11 | 9 | 6 | 10 | 11 | 9 | 11 | 9 | 5 | 6 | 4 | 4 | 5 | 5 | -1 |
Swell 1 Height (m) Direction Period (s) | E 3 | ENE 4 | ENE 4 | N 11 | N 11 | NW 4 | N 10 | N 9 | N 8 | NW 15 | NW 4 | NNW 5 | — | — | N 8 | N 8 | — | N 8 | NNW 8 | NNW 8 | NNW 8 |
| kJ | 1 | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 1 | 9 | 4 | 20 | — | — | 55 | 30 | — | 90 | 22 | 12 | 6 |
Swell 2 Height (m) Direction Period (s) | N 11 | N 11 | N 11 | — | — | N 10 | — | — | — | — | NW 14 | N 13 | — | — | NW 16 | NNW 15 | — | NNW 15 | NNW 14 | NW 14 | NNW 14 |
| kJ | 2 | 2 | 2 | — | — | 2 | — | — | — | — | 8 | 3 | — | — | 11 | 88 | — | 156 | 81 | 54 | 18 |
Swell 3 Height (m) Direction Period (s) | NW 15 | NE 5 | NW 14 | — | — | NW 13 | N 16 | — | — | N 7 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 8 | 1 | 8 | — | — | 7 | 5 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | SW 2 | SSW 2 | — | — | — | NW 4 | NW 5 | N 6 | N 7 | W 3 | — | NNW 7 | — | SW 4 | SW 4 | SW 3 |
| kJ | — | — | — | — | — | 2 | 1 | — | — | — | 13 | 69 | 143 | 131 | 7 | — | 273 | — | 17 | 6 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 134 | 14 | 14 | 14 | 125 | 14 | 83 | 14 | 14 | 137 | 38 |
Best forecast wave conditions in Nelson - Tasman Bay | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ruby Bay 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.
Information about the Ruby Bay Surf forecast
The above surf forecast table for Ruby Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ruby Bay can be found by selecting the local surf guide option on the grey menu. Our Ruby Bay 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 (Ruby Bay) 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 Ruby Bay 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 Nelson - Tasman Bay? If you are looking for accommodation near Ruby Bay, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 17 km (11 miles) away. Alternatively, find information about places to stay and car hire in Blenheim which is 80 km (50 miles) away
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