CatchWindow fishing intelligence

Ship John Shoal, NJ Daily Water Report — August 28, 2026

A quiet, humid morning at Ship John Shoal sets the stage for a day that favors boaters, divers, and paddlers over anyone chasing waves. The early low tide at 5:01 will leave flats exposed for shoreline explorers, but the real window opens after sunrise as the flood builds toward a 1.78-meter high at 10:46. Winds are barely stirring out of the east at 4 knots, and the nearly flat calm persists through midday—wave heights hover around 0.04 meters near 10:00, making this one of the tamest late-August days you’ll see around the shoal. Boating scores top out at 7.9 out of 10, and that feels generous until you consider how rarely the Delaware Bay offers this little fetch. The southeast swell is negligible at two seconds, and the ocean current runs light at 0.6 m/s toward 326 degrees. Diving holds steady at 7.6, matching the three previous days, with a warm sea surface temperature of 26.7°C and a water temp anomaly nearly a full degree above average. Visibility at the surface runs 12.7 kilometers, though that’s atmospheric—subsurface clarity is anyone’s guess. Kayaking scores 7.5, helped by the same dead-calm conditions that make paddling through the flood current manageable, but the wind will flirt with 6 knots by afternoon, so plan your return leg before the ebb kicks up around 17:00. Fishing sits at 6.6, identical to yesterday. The full moon at 100% illumination creates a strong solunar period from noon to 2:00 PM, which aligns nicely with the outgoing tide. The chlorophyll reading is very high at 9.49 mg per cubic meter, indicative of a bloom, but that doesn’t translate directly to fish location. Anglers should read it as a sign of potential plankton concentration rather than a guarantee of feeding activity. The morning bite looks better than the evening, given the humidity and rising pressure. Surfing is a non-starter at 4.5, with zero wind wave energy and swell barely registering. Sailors will find the breeze too light for consistent planing, scoring a 5. Wildlife watchers get a 6.8, helped by the low-tide exposure and mild wind, though the bright midday sun may keep shorebirds scattered. Compared to yesterday’s boating score of 7.2, today offers a slight upgrade, but it falls short of Tuesday’s 8.6 or Monday’s 9.3. The barometer is rising into the 1018 millibar range, reinforcing stable air through the weekend. Looking ahead, Friday keeps the calm theme with waves staying below 0.1 meters and peak winds under 10 knots. Saturday sees a modest uptick in breeze to 11 knots, but precipitation chances stay low through Monday. The pattern breaks toward midweek with a 30 percent chance of showers and stronger gusts up to 14 knots. For now, the best bet is to launch early, soak in the flat-water window from the morning flood through the solunar peak, and be back at the dock before the afternoon ebb reminds you the tide waits for no one.