Hervey Bay Marine Forecast
Updated Fri Sep 11, 2026
Steady SE breezes, small seas; Friday's chop needs care
Drop a pin on any spot in the world — free in the SeaLegs AI app.
Marine Forecast for Hervey Bay Sep 11–13, 2026
📋 Steady SE breezes, small seas; Friday's chop needs care
Choppy SE wind-wave conditions stack on the SE swell through midday with gusts to 27 knots, making for an uncomfortable, bouncy ride despite modest wave heights. Conditions ease nicely by evening with winds dropping to 8-10 knots and gusts in the mid-teens. Best to wait until after 6:00 PM to head out.
Light 7-11 knot winds and small 1-1.4 foot seas make for a smooth, comfortable day on the water. Conditions stay consistent from morning through evening with no rough patches. This is the best day of the weekend to get out.
Light winds and small seas continue Sunday, with the calmest conditions in the morning hours. A slight afternoon increase to 10-12 knots and 1.4-1.6 foot seas remains comfortable. A great day to be on the water, especially before early afternoon.
Overall conditions this weekend trend easy for boaters, with light SE-S winds under 15 knots and small seas under 2.5 feet throughout. Friday carries a caution due to steep, short-period wind-driven chop from a SE wind-wave riding atop the SE swell during the breezier midday-evening hours, even though the base wind/wave numbers look manageable. Saturday and Sunday settle into clean, light-wind conditions that are excellent for boating.
Recent days at Hervey Bay
Today’s Water at Hervey Bay
Sea surface temperature and chlorophyll around Hervey Bay, imaged fresh every morning. Water at the star is 71.4°F today, and chlorophyll of 0.86 mg/m³ reads as green shelf water at the spot.
Imagery: Sep 10, 2026 · rebuilt every morning
These charts show you the breaks. DeepCast reads them. A zone-by-zone AI fishing report for these exact waters — temperature edges, color changes, and structure, analyzed together — for $4.99.
Get the AI fishing reportSST and chlorophyll from the SeaLegs AI DeepCast satellite pipeline. Charts are a planning aid — always check the official marine forecast before making the run.
About Hervey Bay
Hervey Bay sits in the lee of K'gari (Fraser Island), the world's largest sand island, which walls off the Coral Sea swell before it ever reaches the water. That shelter is the whole story here: on most days the bay is flat, protected boating, and the sea state you actually feel is locally-generated wind-chop, not ocean groundswell. It's why the bay works as a humpback nursery from July to November, and why a run north to Platypus Bay for flathead, snapper, golden trevally or school mackerel is so often on.
The daily forecast below tracks the two things that decide a Hervey Bay day — wind over the shallow flats and the state of the tide — and rolls the next three days into a single call: GO / CAUTION / NO-GO, the same AI rating used in the SeaLegs AI app.
Reading conditions in Hervey Bay
Because Fraser Island blocks the swell, don't read Hervey Bay like an open-coast spot — wind strength and direction, not swell period, make the call. A southeasterly is largely blocked by the island and the mainland, so the bay stays workable in a fresh SE that would shut down the open ocean. The chop that does build is short-period wind-wave over shallow water, so it stacks up fast when the breeze gets against a running tide, then lies down almost as quickly once the wind eases.
The exception is the north. Platypus Bay opens to the top of Fraser Island, so a strong northerly has a long fetch straight down onto the flats and can turn a "sheltered" bay lumpy and uncomfortable, especially on a wind-against-tide push. Watch the tide over the shallows too: big run-out tides drain the sand flats and expose ground you were floating over an hour earlier. Plan launches, the Platypus Bay run and whale-watching trips around a northerly change and the tide, and the shelter does the rest.
Hervey Bay forecast FAQ
How is the sea at Hervey Bay today?
As of Sep 11, 2026, the SeaLegs AI verdict for Hervey Bay is CAUTION. Friday starts and continues through midday with steady 13-14 knot SE winds and gusts up to 27 knots, producing steep, short-period wind-wave chop (2 seconds) riding on top of the SE swell - since both trains come from the same SE sector this isn't a crossing sea, but the wind-driven chop stacks on the swell to create an uncomfortable, choppy ride for much of the day. Wave heights stay modest at 1.4-2.2 feet, but the short 2-second period makes for a jarring, bouncy motion, especially during the gustier morning and midday hours. Conditions improve markedly by evening as winds ease to 8-10 knots SE and gusts drop into the mid-teens, making 6:00 PM onward the most comfortable window of the day.
Is Hervey Bay usually calm enough for boating?
Yes — more than most open-coast waters. K'gari (Fraser Island) blocks the ocean swell, so Hervey Bay is protected and calm much of the time, and the sea state is mostly local wind-chop rather than groundswell. The days to watch are strong northerlies, which have open fetch down Platypus Bay, and wind blowing against a running tide over the shallow flats.
How accurate is this Hervey Bay marine forecast?
The outlook is generated from the latest marine model data and rated GO, CAUTION, or NO-GO by the same AI engine used in the SeaLegs AI app. It's a planning aid, not a substitute for the official Bureau of Meteorology (BoM) marine forecast and any current warnings — always check those before heading out.
How often is this forecast updated?
The page is rebuilt every morning from the latest model run, and the SpotCast card refreshes live in your browser. The date stamp above the outlook shows exactly when it was last generated.
What do GO, CAUTION, and NO-GO mean?
GO means conditions are favourable for most recreational boats. CAUTION means marginal — manageable for experienced crews in capable vessels, but check the wind and sea timing closely. NO-GO means conditions are hazardous for small craft and the trip is best postponed.
Can I get a forecast like this for my own spot?
Yes. In the free SeaLegs AI app you can drop a pin anywhere on Earth — your local ramp, a favourite mark, or a spot well offshore — and get the same AI-rated marine forecast and trip planning.
What is the water temperature at Hervey Bay today?
As of Sep 10, 2026, the satellite-derived sea surface temperature at Hervey Bay is about 71.4°F, with chlorophyll around 0.86 mg/m³ (green shelf water). The SST and chlorophyll charts on this page are rebuilt every morning from the SeaLegs AI DeepCast satellite pipeline.
More offshore forecasts
Get this forecast for your own spot
Drop a pin on any spot on planet Earth in the free SeaLegs AI app — AI marine forecasts, fishing reports, and trip planning, rated GO / CAUTION / NO-GO.
📍 Get a Marine Forecast Near You →or download directly: