At Waiau River Mouth in New Zealand, for the next 24-48 hours, expect predominantly moderate wind conditions shifting mostly from the southeast at speeds ranging between 10-18 knots. Sea state will be generally moderate with occasional short periods of slight roughness as wind speeds fluctuate. Swell heights are expected around 1 to 1.5 meters, coming mainly from the southeast with an average swell period of approximately 8-10 seconds. Weather outlook includes mostly cloudy skies with intermittent rain showers, reducing visibility at times but generally remaining fair when precipitation clears. Sea surface temperatures are expected to stay near 12°C, consistent with typical late winter conditions. Sunrise will be at about 7:30 AM and sunset around 6:13 PM local time. No current warnings or alerts specific to the area have been issued, but the tidal coefficient remains high, indicating strong tidal currents and potentially challenging navigation during peak tidal flows.

Regarding river and coastal conditions, the Waiau River is experiencing high tidal coefficients around 80, implying significant tidal fluctuations with high tides near 3.2 meters and lows about 0.3 meters, which will influence river mouth conditions and nearby coastal areas. River flows and soil moisture are expected to be near normal for the season with temperatures slightly above average, reducing risks of frost or cold snaps and maintaining moderate river flow levels. Elevated tidal ranges combined with moderate winds may produce choppy conditions at the river mouth, potentially impacting small craft or fishing activities. Cloudy and rainy periods can increase river runoff, slightly affecting water clarity and visibility near the coast. Monitoring local updates is advised as conditions can shift with weather changes common to this transitional season.