Warning: NIL warning for BRETT

Situation: A strong southwest flow over New Zealand weakens on Saturday as a narrow ridge moves onto the country from the Tasman Sea. A trough crosses the South Island on Sunday and the North Island on Monday, followed by another ridge.

Forecast: Thursday: Southwest 20 knots gusting 30 knots. Sea moderate. Fair visibility in showers, poor at times in heavier showers this afternoon. Friday: Southwest 20 knots gusting 30 knots. Sea moderate. Fair visibility in showers, poor at times in heavier showers during the afternoon.

Outlook: Outlook until midnight Monday: Saturday: Southwest 20 knots, easing to 15 knots at night. Early showers, then mostly fine. Sunday: Southwest 15 knots, tending northwest 15 knots in the evening. Cloud increasing, a few showers developing. Monday: A change to southwest 25 knots. A few showers.

Swell: Swell forecast to midnight Monday: Nil significant.

High tide at Opua
Time: 5:15pm Thursday 17 May 2012 - Height: 2.2m
Time: 5:29am Friday 18 May 2012 - Height: 2.2m