Lake Wakatipu rose 17cm past its first flooding level alert marker of 310.8m above sea level, although the levels at monitoring stations at Frankton and on the Kawarau River remained under the flood warning level.
The level of the natural dam on the Young River peaked yesterday and the Department of Conservation is expected today to downgrade its "high alert" level for the remote valley.
Doc Wanaka area manager Paul Hellebrekers said the amount of rain forecast to fall today was "greatly reduced" and no changes were predicted in the volume of water putting pressure on the landslip dam blocking the Young River.
There had been no intention slips left at Doc offices by any trampers signalling trips into either the Makarora of Matukituki Valleys of Mt Aspiring National Park, he said.
Queenstown Lakes District Council contractors will begin assessing damaged roads, some of which provided access to the national park.
QLDC spokeswoman Meaghan Miller said there was 4WD access only through a flooded ford near the end of the Mt Aspiring Rd, which led to national park drop-off area at Raspberry Flat.
Work to repair washouts on the road would not be started until today, once water levels dropped further.
At Glenorchy - Lake Wakatipu's gateway to Mt Aspiring National Park - Kinloch and Greenstone Station Rds reopened yesterday.
An unsealed section of Glenorchy-Paradise Rd was scheduled to be opened late yesterday afternoon, Ms Miller said.
Ongoing work was needed for the Dans Paddock area, but the road would be passable by 4WD, as was the situation at Rees Valley Rd beyond Invincible ford, she said.
Remedial works would continue tomorrow, she said.
Lake Wanaka fell about a metre short of its first flooding alert mark of 279.4m above sea level (masl), and was 278.5m last night.
The level of the Young River lake peaked at 581.3m above sea level on Sunday but had dropped back to 580.4m last night.
