South-west WA's mutant slab barrel — The Box is an elite-level reef break that reels off a shallow reef shelf with freight-train speed. For expert surfers only, this Indian Ocean beast is powered by the same diurnal tides that define the Margaret River region's unique rhythm.
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How the tides and swell change through the year at Western Australia locations.
Afternoon seabreezes, still plenty of swell.
The peak — massive Indian Ocean groundswells.
Powerful SW swells, cooler temps, less wind.
Fading into smaller but still clean conditions.
Annual tide statistics computed from verified BOM data for The Box.
1.3m on 15 Jun at 08:34
0.09m on 24 Dec at 06:01
0.33m between high and low
June — highest avg high tides
Two high and two low tides daily
1.21m — from lowest low to highest high
High and low tide times for the next 7 days, drawn from verified BOM data.
| Day | High tides | Low tides |
|---|---|---|
| Fri 11 Sep | 10:36 · 0.84m, 23:26 · 0.73m | 02:35 · 0.55m, 17:14 · 0.49m |
| Sat 12 Sep | 11:30 · 0.75m, 23:50 · 0.76m | 03:13 · 0.52m, 15:25 · 0.53m |
| Sun 13 Sep | 12:28 · 0.66m, 22:15 · 0.82m | 03:55 · 0.51m, 15:42 · 0.51m |
| Mon 14 Sep | 10:27 · 0.58m, 22:48 · 0.87m | 04:38 · 0.51m, 16:06 · 0.5m |
| Tue 15 Sep | 14:58 · 0.52m, 23:26 · 0.9m | 13:12 · 0.49m, 16:30 · 0.49m |
| Wed 16 Sep | 07:35 · 0.55m, 11:44 · 0.49m | 06:06 · 0.53m, 10:17 · 0.47m, 13:52 · 0.44m |
| Thu 17 Sep | 00:04 · 0.9m, 12:22 · 0.46m | 11:09 · 0.45m, 14:30 · 0.4m |