Christchurch

Marine Recreational Forecasts - Christchurch

Area Description:

Inshore waters from Lyttelton Harbour to the Waimakariri River mouth.

Situation:

A ridge of high pressure builds over most of New Zealand today, then moves north on Wednesday as northwesterlies strengthen over the South Island ahead of an approaching front. The front moves north reaching central New Zealand by the end of Thursday, followed by a west to southwesterly flow, while a trough affects the upper North Island. The front crosses the North Island on Friday and the southwesterly flow behind it eases.

Warnings:

NIL

Forecasts:

Tuesday: Variable 5 knots. Northeast 10 knots developing for a time this afternoon. Sea slight. Fine. Easterly swell half a metre or less.

Outlook:

Outlook until midnight Friday: Wednesday: Variable 5 knots in the morning. Northwest 15 knots developing in the evening. Fine. Thursday: Northerly 15 knots, easing to variable 5 knots early. Becoming northwest 15 knots later. Fine. Northeast swell half a metre or less. Friday: Westerly 10 knots, becoming easterly 10 knots later. Cloudy periods.

Swell:

Marine Coastal Forecasts - Rangitata

Forecast:

Tuesday : Southwest 15 knots, turning northwest 15 knots in the morning. Sea slight. Long period southwest swell 4 metres offshore, easing.

Outlook:

Outlook following 3 days: Wednesday: Northerly 10 knots, rising to 20 knots in the evening. Moderate southwest swell offshore. Thursday: Northerly 15 knots, becoming westerly 20 knots late. Moderate southwest swell offshore. Friday: Westerly 20 knots, turning southerly 10 knots early. Moderate southwest swell.

Marine Coastal Forecasts - Chatham Islands

Forecast:

Tuesday : Southwest 25 knots. Sea rough. Long period southwest swell rising to 6 metres for a time. Northeast swell 1 metre easing. Poor visibility in showers, with thunderstorms possible, easing in the morning.

Outlook:

Outlook following 3 days: Wednesday: Westerly 25 knots, easing to 15 knots in the afternoon. Rough sea easing. Heavy southwest swell easing. Thursday: Northwest 10 knots, rising to 25 knots early. Sea becoming rough. Moderate southwest swell. Friday: Northwest 25 knots, easing to westerly 15 knots early. Turning southerly 10 knots late. Rough sea easing. Moderate westerly swell.

Marine Coastal Forecasts - Conway

Forecast:

Tuesday : Southwest 15 knots, turning northerly 15 knots in the morning. Easing to variable 10 knots in the evening. Sea slight. Long period southwest swell 4 metres offshore, easing.

Outlook:

Outlook following 3 days: Wednesday: Variable 10 knots, becoming westerly 15 knots for a time in the morning and afternoon. Moderate southwest swell offshore, easing for a time. Thursday: Northerly 20 knots. Moderate southwest swell offshore. Moderate northeast swell developing offshore for a time. Friday: Northwest 15 knots, turning southerly 10 knots early. Moderate southwest swell.