Over the next 24 to 48 hours at the Waitaki River Mouth in New Zealand, expect variable coastal weather conditions. Winds will predominantly come from the west to southwest, with speeds ranging from 15 to 20 knots, increasing slightly during the evening. Sea state is forecast to be moderate, with wave heights around 1.5 to 2 meters. Swell is expected from the southwest at about 1.5 meters with a period near 9 seconds, contributing to some rolling but generally manageable sea conditions. The weather outlook is mixed, with morning sunshine giving way to cloudier skies by late afternoon and occasional light rain showers possible overnight. Visibility will remain good during the day but may reduce somewhat in rain or mist. The sea temperature at this time of year typically ranges from 12 to 14°C. Sunrise tomorrow is at approximately 8:14 AM, and sunset will be around 5:10 PM local time. There are no immediate warnings or alerts, but mariners should monitor for possible sudden changes due to local weather fronts.

Regarding river and coastal conditions, the Waitaki River is experiencing a high tidal coefficient (~85-86), indicating significant tidal range and strong currents, which may be further influenced by wind conditions. River flow is likely near or slightly below normal for the season. Heavy rain in parts of Otago could increase freshwater inflow temporarily, slightly affecting river mouth conditions and water turbidity. The combination of moderate to strong SW winds and tidal movements will enhance current speeds near the river mouth, potentially impacting navigation and fishing activities. Coastal soil moisture and river flows are forecast near average to slightly below average, suggesting stable but dynamic conditions in the river estuary area. Visitors and operators should remain mindful of tidal schedules and changing weather during this period.