Over the next 24 to 48 hours at Waiau River Mouth, New Zealand, expect light to moderate winds predominantly from the southeast shifting to the east-northeast, with speeds ranging between 10 to 15 knots. The sea state will be mostly calm to moderate with occasional slight chop due to the moderate winds. Swell heights are likely around 1 to 1.5 meters, coming from the south-southeast with periods near 8 to 10 seconds, creating gentle rolling waves suitable for coastal activities. Weather will be mostly cloudy with intermittent sunny breaks; light rain showers are possible but not widespread. Visibility should remain good throughout this period, and sea temperatures are expected to hover near 13°C, consistent with seasonal averages for June in the region. There are no current marine warnings or alerts issued for the area.

River conditions at the Waiau River Mouth are expected to be stable with normal flows, consistent with near-average soil moisture and river flow outlooks for winter in the region. Slight increases in river flow could occur during occasional light rain events but no significant flooding is anticipated. Coastal conditions will remain safe, though the cloudy weather and cooler temperatures around 6°C at night may lead to some dampness along the riverbanks. Sunrise is approximately 7:45 AM and sunset near 5:10 PM local time, providing limited daylight hours for outdoor activities. Overall, the weather and sea conditions favor safe navigation and recreational use, with no significant hazards expected.